Substituted quinazolin-4-ylamine analogues

ABSTRACT

Substituted quinazolin-4-ylamine analogues are provided. Such compounds are ligands that may be used to modulate specific receptor activity in vivo or in vitro, and are particularly useful in the treatment of conditions associated with pathological receptor activation in humans, domesticated companion animals and livestock animals. Pharmaceutical compositions and methods for using them to treat such disorders are provided, as are methods for using such ligands for receptor localization studies.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of U.S. patent application Ser. No. 11/345,926, filed Feb. 1, 2006, pending, which is a divisional of U.S. patent application Ser. No. 10/347,210, filed Jan. 17, 2003, now U.S. Pat. No. 7,074,799, which claims priority to U.S. provisional patent application Ser. Nos. 60/349,920, filed Jan. 17, 2002, and 60/350,527, filed Jan. 22, 2002. The contents of each of these applications are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

This invention relates generally to substituted quinazolin-4-ylamine analogues that are modulators of capsaicin receptors, and to the use of such compounds for treating conditions related to capsaicin receptor activation. The invention further relates to the use such compounds as probes for the detection and localization of capsaicin receptors.

BACKGROUND OF THE INVENTION

Pain perception, or nociception, is mediated by the peripheral terminals of a group of specialized sensory neurons, termed “nociceptors.” A wide variety of physical and chemical stimuli induce activation of such neurons in mammals, leading to recognition of a potentially harmful stimulus. Inappropriate or excessive activation of nociceptors, however, can result in debilitating acute or chronic pain.

Neuropathic pain involves pain signal transmission in the absence of stimulus, and typically results from damage to the nervous system. In most instances, such pain is thought to occur because of sensitization in the peripheral and central nervous systems following initial damage to the peripheral system (e.g., via direct injury or systemic disease). Neuropathic pain is typically burning, shooting and unrelenting in its intensity and can sometimes be more debilitating that the initial injury or disease process that induced it.

Existing treatments for neuropathic pain are largely ineffective. Opiates, such as morphine, are potent analgesics, but their usefulness is limited because of adverse side effects, such as physical addictiveness and withdrawal properties, as well as respiratory depression, mood changes, and decreased intestinal motility with concomitant constipation, nausea, vomiting, and alterations in the endocrine and autonomic nervous systems. In addition, neuropathic pain is frequently non-responsive or only partially responsive to conventional opioid analgesic regimens. Treatments employing the N-methyl-D-aspartate antagonist ketamine or the alpha(2)-adrenergic agonist clonidine can reduce acute or chronic pain, and permit a reduction in opioid consumption, but these agents are often poorly tolerated due to side effects.

Topical treatment with capsaicin has been used to treat chronic and acute pain, including neuropathic pain. Capsaicin is a pungent substance derived from the plants of the Solanaceae family (which includes hot chili peppers) and appears to act selectively on the small diameter afferent nerve fibers (A-delta and C fibers) that are believed to mediate pain. The response to capsaicin is characterized by persistent activation of nociceptors in peripheral tissues, followed by eventual desensitization of peripheral nociceptors to one or more stimuli. From studies in animals, capsaicin appears to trigger C fiber membrane depolarization by opening cation selective channels for calcium and sodium. Capsaicin responses in isolated sensory neurons show dose-dependence.

Such responses are also evoked by structural analogues of capsaicin that share a common vanilloid moiety. One such analogue is resiniferatoxin (RTX), a natural product of Euphorbia plants. The term vanilloid receptor (VR) was coined to describe the neuronal membrane recognition site for capsaicin and such related irritant compounds. The capsaicin response is competitively inhibited (and thereby antagonized) by another capsaicin analog, capsazepine, and is also inhibited by the non-selective cation channel blocker ruthenium red. These antagonists bind to VR with no more than moderate affinity (typically with K_(i) values of no lower than 140 μM).

Recently, rat and human receptors for capsaicin were cloned from dorsal root ganglion cells. Such receptors have also been referred to as VR1, and the terms “VR1” and “capsaicin receptor” are used interchangeably herein to refer to rat and/or human receptors of this type, as well as mammalian homologs. The role of VR1 in pain sensation has been confirmed using mice lacking this receptor, which exhibit no vanilloid-evoked pain behavior, and impaired responses to heat and inflammation. The capsaicin receptor is a nonselective cation channel with a threshold for opening that is lowered in response to elevated temperatures, low pH, and capsaicin receptor agonists. For example, the channel usually opens at temperatures higher than about 45° C. Opening of the capsaicin receptor channel is generally followed by the release of inflammatory peptides from neurons expressing the receptor and other nearby neurons, increasing the pain response. After initial activation by capsaicin, the capsaicin receptor undergoes a rapid desensitization via phosphorylation by cAMP-dependent protein kinase.

Because of their ability to thus desensitize nociceptors in peripheral tissues, VR1 agonist vanilloid compounds have been used as topical anesthetics. However, agonist application may itself cause burning pain, which limits this therapeutic use.

Thus, compounds that interact with VR1 but do not elicit the initial painful sensation of VR1 agonist vanilloid compounds, are desirable for the treatment of chronic and acute pain, including neuropathic pain. Antagonists of this receptor are particularly desirable for the treatment of pain, as well as conditions such as tear gas exposure, itch and urinary incontinence. The present invention fulfills this need, and provides further related advantages.

SUMMARY OF THE INVENTION

The present invention provides capsaicin receptor modulators that modulate, preferably inhibit, capsaicin receptor activation. Within certain aspects, compounds provided herein are characterized by the formula:

or a pharmaceutically acceptable salt thereof.

Within Formula I, V and X are each independently N or CR₁, with the proviso that at least one of V and X is N; U is N or CR₂, with the proviso that if V and X are N, then U is CR₂. W, Y and Z are each independently N or CR₁. R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino.

R₂ is: (i) hydrogen, halogen, cyano or —COOH; (ii) C₂-C₈alkoxycarbonyl, C₁-C₈alkanoyl, C₂-C₈alkanone, C₁-C₈alkanoyloxy, C₁-C₈-carbonate or C₁-C₈-carbamate, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b) or R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, N(R_(z)), O, S, SO₂, —C(═O)_(p)N(R_(z)), N(R_(z))C(═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl optionally substituted with from 1 to 3 substituents independently chosen from R_(b) or R_(d); and R_(y) and R_(z) are independently (a) hydrogen, C₁-C₈alkyl, C₂-C₈alkanone, C₂-C₈alkyl ether, C₂-C₈alkenyl, a 4- to 10-membered carbocycle or heterocycle, or (b) joined to R_(c), to form a 4- to 10-membered carbocycle or heterocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b) or R_(d); or R_(y) and R_(z) are joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b) or R_(d).

R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, oxo, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₁-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl).

R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl).

Ar₁ and Ar₂ are independently selected from 5- to 10-membered aromatic carbocycles and heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a). L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl. R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is optionally substituted with from 1 to 9 substituents independently selected from R_(b). Within certain compounds of Formula I, Ar₂ is a 5- to 7-membered aromatic heterocycle, optionally substituted as described above.

Within further aspects, compounds provided herein are characterized by the formula:

or a pharmaceutically acceptable salt thereof. Within Formula II, U, V, W, X, Y and Z are as described above. Ar₁ and Ar₂ of Formula II are each independently chosen from phenyl and 5- and 6-membered aromatic heterocycles, optionally substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a), as described above. R₇ of Formula II is C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, mono- or di-(C₁-C₈alkyl)amino or a 3- to 10-membered heterocycle, each of which is optionally substituted with from 1 to 5 substituents independently selected from hydroxy, halogen, C₁-C₆alkyl, C₁-C₈alkoxy, C₂-C₈alkyl ether, haloC₁-C₈alkyl and haloC₁-C₈alkoxy.

Within still further aspects, compounds provided herein are substituted 2-aminoalkyl-quinazoline-4ylamine analogues of Formula III:

or a pharmaceutically acceptable salt or prodrug thereof, wherein:

-   V, X, W, Y and Z are as described above; -   Ar₁ and Ar₂ are independently selected from phenyl and 5- to     7-membered aromatic heterocycles, each of which is unsubstituted or     substituted with from 1 to 3 substituents independently selected     from groups of the formula LR_(a) as described above; -   R₃ and R₄ are:     -   (i) each independently selected from:         -   (a) hydrogen;         -   (b) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₁-C₈alkoxy,             C₃-C₈alkanone, C₂-C₈alkanoyl, C₂-C₈alkyl ether,             C₆-C₁₀arylC₀-C₈alkyl, 5- to 10-membered             heterocycleC₀-C₈alkyl and —(SO₂)C₁-C₈alkyl, each of which is             optionally substituted with from 1 to 9 substituents             independently selected from R_(b); and         -   (c) groups that are joined to an R₅ or R₆ to form a 4- to             10-membered heterocyclic group that is unsubstituted or             substituted with from 1 to 6 substituents independently             selected from R_(b); or     -   (ii) joined to form, with the N to which they are bound, a 4- to         10-membered heterocyclic group that is unsubstituted or         substituted with from 1 to 6 substituents independently selected         from R_(b), C₁-C₈alkanoyl, 4- to 7-membered         heterocycloalkylC₀-C₄alkyl, and mono- and         di-(C₁-C₆alkyl)aminoC₁-C₆alkyl; -   R₅ and R₆ are, independently at each occurrence:     -   (i) each independently selected from:         -   (a) hydrogen or hydroxy;         -   (b) C₁-C₈alkyl, unsubstituted or substituted with 1 or 2             substituents independently selected from R_(b); and         -   (c) groups that are joined to R₃ or R₄ to form a 4- to             10-membered heterocyclic group that is unsubstituted or             substituted with from 1 to 6 substituents independently             selected from R_(b);     -   (ii) taken together to form a keto group; or     -   (iii) joined to form a 3- to 7-membered carbocyclic or         heterocyclic ring, unsubstituted or substituted with from 1 to 4         substituents selected from R_(b); -   R_(b) is as described above; and -   n is 1, 2 or 3.

Within certain additional aspects, the compounds provided herein are substituted 2-hydroxyalkyl-quinazoline-4ylamine analogues of Formula IV:

or a pharmaceutically acceptable salt or prodrug thereof, wherein:

-   V, X, W, Y and Z are as described above; -   Ar₁ and Ar₂ are independently selected from phenyl and 5- to     7-membered aromatic heterocycles, each of which is unsubstituted or     substituted with from 1 to 3 substituents independently selected     from groups of the formula LR_(a) as described above; -   R₃ is selected from:     -   (i) hydrogen;     -   (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether,         C₆-C₁₀arylC₀-C₈alkyl, and 5- to 10-membered         heterocycleC₀-C₈alkyl, each of which is optionally substituted         with from 1 to 9 substituents independently selected from R_(b);         and     -   (iii) groups that are joined to an R₅ or R₆ to form a 4- to         10-membered heterocyclic group that is unsubstituted or         substituted with from 1 to 6 substituents independently selected         from R_(b); -   R₅ and R₆ are, independently at each occurrence:     -   (i) each independently selected from:         -   (a) hydrogen or hydroxy;         -   (b) C₁-C₈alkyl, unsubstituted or substituted with 1 or 2             substituents independently selected from R_(b); and         -   (c) groups that are joined to R₃ to form a 5- to 10-membered             heterocyclic group that is unsubstituted or substituted with             from 1 to 6 substituents independently selected from R_(b);             or     -   (ii) joined to form a 3- to 7-membered carbocyclic or         heterocyclic ring, unsubstituted or substituted with from 1 to 4         substituents selected from R_(b); -   R_(b) is as described above; and -   n is 1, 2 or 3.

Within certain aspects, compounds as described herein exhibit a K_(i) of no greater than 1 micromolar, 100 nanomolar, 10 nanomolar or 1 nanomolar in a capsaicin receptor binding assay and/or have an IC₅₀ value of no greater than 1 micromolar, 100 nanomolar, 10 nanomolar or 1 nanomolar in an assay for determination of capsaicin receptor antagonist activity. Preferred compounds generally include those with higher potency (i.e., lower K_(i) or lower IC₅₀).

Within certain aspects, compounds as described herein are labeled with a detectable marker (e.g., radiolabeled or fluorescein conjugated).

The present invention further provides, within other aspects, pharmaceutical compositions comprising at least one compound or salt as described herein in combination with a physiologically acceptable carrier or excipient.

Within further aspects, methods are provided for reducing calcium conductance of a cellular capsaicin receptor, comprising contacting a cell (e.g., neuronal) expressing a capsaicin receptor with an effective amount of at least one compound or salt as described herein. Such contact may occur in vivo or in vitro.

Methods are further provided, within other aspects, for inhibiting binding of vanilloid ligand to a capsaicin receptor. Within certain such aspects, the inhibition takes place in vitro. Such methods comprise contacting a capsaicin receptor with at least one compound or salt as described herein, under conditions and in an amount sufficient to detectably inhibit vanilloid ligand binding to the capsaicin receptor. Within other such aspects, the capsaicin receptor is in a patient. Such methods comprise contacting cells expressing a capsaicin receptor in a patient with at least one compound or salt as described herein in an amount sufficient to detectably inhibit vanilloid ligand binding to cells expressing a cloned capsaicin receptor in vitro, and thereby inhibiting binding of vanilloid ligand to the capsaicin receptor in the patient.

The present invention provides, within further aspects, methods for treating a condition responsive to capsaicin receptor modulation in a patient, comprising administering to the patient a capsaicin receptor modulatory effective amount of at least one compound or salt as described herein.

Within other aspects, methods are provided for treating pain in a patient, comprising administering to a patient suffering from pain a capsaicin receptor modulatory amount of at least one compound or salt as described herein.

Methods are further provided, within other aspects, for treating itch, urinary incontinence, cough and/or hiccup in a patient, comprising administering to a patient suffering from one or more of the foregoing conditions a capsaicin receptor modulatory amount of at least one compound or salt as described herein.

The present invention further provides methods for promoting weight loss in an obese patient, comprising administering to an obese patient a capsaicin receptor modulatory amount of at least one compound or salt as described herein.

Within further aspects, the present invention provides methods for determining the presence or absence of capsaicin receptor in a sample, comprising: (a) contacting a sample with a compound as described herein under conditions that permit binding of the compound to capsaicin receptor; and (b) detecting a level of the compound bound to capsaicin receptor.

The present invention further provides packaged pharmaceutical preparation, comprising: (a) a pharmaceutical composition as described herein in a container; and (b) instructions for using the composition to treat one or more conditions responsive to capsaicin receptor modulation, such as pain, itch, urinary incontinence, cough, hiccup, and/or obesity.

In yet another aspect, the invention provides methods of preparing the compounds disclosed herein, including the intermediates.

These and other aspects of the present invention will become apparent upon reference to the following detailed description.

DETAILED DESCRIPTION

As noted above, the present invention provides capsaicin receptor modulators comprising substituted quinazolin-4-ylamine analogues. Such modulators may be used in vitro or in vivo, to modulate (preferably inhibit) capsaicin receptor activity in a variety of contexts.

Certain compounds of Formula I include those in which:

-   V, X, W, Y and Z are each independently N or CR₁, with the proviso     that at least one of V and X is N; -   U is N or CR₂, with the proviso that if V and X are N, then U is     CR₂; -   R₁ is independently selected at each occurrence from hydrogen,     halogen, hydroxy, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy,     haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; -   R₂ is:     -   (i) hydrogen, halogen or cyano;     -   (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is         unsubstituted or substituted with from 1 to 9 substituents         independently selected from R_(d); or     -   (iii) a group of the formula —R_(c)-M-A-R_(y), wherein:         -   R_(c) is C₀-C₃alkyl;         -   M is a bond, S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p),             SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1;         -   A is a bond or C₁-C₈alkyl, optionally substituted with from             1 to 3 substituents independently selected from R_(d); and         -   R_(y) and R_(z), if present, are:             -   (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkanone,                 C₂-C₈alkenyl, a 4- to 10-membered carbocycle, or joined                 to R_(c), to form a 4- to 10-membered carbocycle,                 wherein each R_(y) and R_(z) is independently                 unsubstituted or substituted with from 1 to 9                 substituents independently selected from R_(d); or             -   (b) joined to form a 4- to 10-membered heterocycle that                 is unsubstituted or substituted with from 1 to 9                 substituents independently selected from R_(d);     -    wherein R_(d) is independently selected at each occurrence from         hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro,         C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl,         phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino,         (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to         7-membered heterocycle) (C₁-C₈alkyl); -   Ar₂ is a 5- to 7-membered aromatic heterocycle, optionally     substituted with from 1 to 3 substituents independently selected     from groups of the formula LR_(a); -   Ar₁ is a 5- to 10-membered aromatic carbocycle or heterocycle,     optionally substituted with from 1 to 3 substituents independently     selected from groups of the formula LR_(a); -   L is independently selected at each occurrence from a bond, —O—,     —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—,     —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)—     and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected     at each occurrence from 0, 1 and 2; and R_(x) is independently     selected at each occurrence from hydrogen and C₁-C₈alkyl; -   R_(a) is independently selected at each occurrence from:     -   (i) hydrogen, halogen, cyano and nitro; and     -   (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether,         3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino         and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is         unsubstituted or substituted with from 1 to 9 substituents         independently selected from R_(b); and -   R_(b) is independently chosen at each occurrence from hydroxy,     halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl,     C₁-C₈alkoxy, C₁-C₈alkylthio, C₁-C₈alkyl ether, hydroxyC₁-C₈alkyl,     haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and     di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle     and (5- to 7-membered heterocycle) (C₁-C₈alkyl).

Such compounds are referred to herein as compounds of Formula Ib.

Within certain compounds of Formula Ib, Ar₂ is selected from pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, pyrrolyl, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl and thiadiazolyl, each of which is unsubstituted or substituted with 1 or 2 substituents selected from halogen, cyano, C₁-C₆alkyl, haloC₁-C₆alkyl, hydroxyC₁-C₆alkyl, C₁-C₆alkyl ether, C₁-C₆alkanoyl, amino, mono- and di-(C₁-C₆alkyl)amino. In certain embodiments, Ar₂ is pyridyl, isoxazolyl, thiadiazolyl or pyrazolyl, each of which is unsubstituted or substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl. For example, Ar₁ and Ar₂ may each be pyridyl, substituted with 1 substituent independently chosen from halogen, C₁-C₄alkyl, C₁-C₄haloalkyl, and C₁-C₄alkoxy.

Within certain compounds of Formula Ib, U is CR₂, and R₂ is:

-   -   (i) hydrogen or halogen; or     -   (ii) C₁-C₆alkyl, —(CH₂)_(n)NH₂, —(CH₂)_(n)NH(C₁-C₈alkyl),         —(CH₂)_(n)N(C₁-C₈alkyl)₂, —(CH₂)_(n)(5- to 8-membered         heterocycloalkyl), or —(CH₂)_(n)OH, each of which is         unsubstituted or substituted with from 1 to 4 substituents         independently chosen from halogen, cyano, hydroxy, amino, mono-         and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, and haloC₁-C₆alkyl.

Certain compounds of Formula II include those in which:

-   V, X, W, Y and Z are each independently N or CR₁, with the proviso     that at least one of V and X is N; -   U is N or CR₂, with the proviso that if V and X are N, then U is     CR₂; -   R₁ is independently selected at each occurrence from hydrogen,     halogen, hydroxy, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy,     haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; -   R₂ is:     -   (i) hydrogen, halogen or cyano;     -   (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is         unsubstituted or substituted with from 1 to 9 substituents         independently selected from R_(d); or     -   (iii) a group of the formula —R_(c)-M-A-R_(y), wherein:         -   R_(c) is C₀-C₃alkyl;         -   M is a bond, S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p),             SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1;         -   A is a bond or C₁-C₈alkyl, optionally substituted with from             1 to 3 substituents independently selected from R_(d); and         -   R_(y) and R_(z), if present, are:             -   (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkanone,                 C₂-C₈alkenyl, a 4- to 10-membered carbocycle, or joined                 to R_(c), to form a 4- to 10-membered carbocycle,                 wherein each R_(y) and R_(z) is independently                 unsubstituted or substituted with from 1 to 9                 substituents independently selected from R_(d); or             -   (b) joined to form a 4- to 10-membered heterocycle that                 is unsubstituted or substituted with from 1 to 9                 substituents independently selected from R_(d);     -    wherein R_(d) is independently selected at each occurrence from         hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro,         C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl,         phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino,         (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to         7-membered heterocycle)(C₁-C₈alkyl); -   Ar₁ and Ar₂ are independently chosen from phenyl and 5- and     6-membered aromatic heterocycles, optionally substituted with from 1     to 3 substituents independently selected from groups of the formula     LR_(a); -   L is independently selected at each occurrence from a bond, —O—,     —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—,     —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)—     and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected     at each occurrence from 0, 1 and 2; and R_(x) is independently     selected at each occurrence from hydrogen and C₁-C₈alkyl; -   R_(a) is independently selected at each occurrence from:     -   (i) hydrogen, halogen, cyano and nitro; and     -   (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether,         3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino         and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is         unsubstituted or substituted with from 1 to 9 substituents         independently selected from R_(b); -   R_(b) is independently chosen at each occurrence from hydroxy,     halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl,     C₁-C₈alkoxy, C₁-C₈alkylthio, C₁-C₈alkyl ether, hydroxyC₁-C₈alkyl,     haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and     di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle     and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and -   R₇ is C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, mono- or     di(C₁-C₈alkyl)amino or a 3- to 10-membered heterocycle, each of     which is optionally substituted with from 1 to 5 substituents     independently selected from hydroxy, halogen, C₁-C₆alkyl,     C₁-C₈alkoxy, C₂-C₈alkyl ether, haloC₁-C₈alkyl and haloC₁-C₈alkoxy.

Such compounds are referred to herein as compounds of Formula IIb.

Within certain compounds of Formula IIb, Ar₂ is phenyl or pyridyl, each of which is optionally substituted with 1 or 2 substituents selected from halogen, cyano, C₁-C₆alkyl and haloC₁-C₆alkyl. In certain embodiments, Ar₂ is phenyl, optionally substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl.

Within certain compounds of Formula IIb, U is CR₂, and R₂ is:

-   -   (i) hydrogen or halogen; or     -   (ii) C₁-C₆alkyl, —(CH₂)_(n)NH₂, —(CH₂)_(n)NH(C₁-C₈alkyl),         —(CH₂)_(n)N(C₁-C₈alkyl)₂, —(CH₂)_(n)(5- to 8-membered         heterocycloalkyl) or —(CH₂)_(n)OH, each of which is         unsubstituted or substituted with from 1 to 4 substituents         independently chosen from halogen, cyano, hydroxy, amino, mono-         and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl and haloC₁-C₆alkyl.

Within certain compounds of Formula IIb, R₇ comprises a nitrogen atom directly bonded to the SO₂. In certain embodiments, R₇ is amino, mono- or di(C₁-C₆alkyl)amino, morpholinyl, piperidinyl, piperazinyl or pyrrolidinyl, each of which is unsubstituted or substituted with from 1 to 3 substituents independently chosen from halogen, C₁-C₆alkyl and haloC₁-C₆alkyl. In other embodiments, R₇ is C₁-C₆alkyl, haloC₁-C₆alkyl, morpholinyl, piperidinyl, piperazinyl or pyrrolidinyl, optionally substituted with from 1 to 5 substituents independently selected from C₁-C₆alkyl, C₁-C₆alkoxy, C₁-C₆alkyl ether, haloC₁-C₆alkyl and haloC₁-C₆alkoxy.

Certain compounds of Formula III include those in which:

-   V, X, W, Y and Z are each independently N or CR₁, with the proviso     that at least one of V and X is N; -   R₁ is independently selected at each occurrence from hydrogen,     halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl,     C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₆alkyl)amino; -   Ar₁ and Ar₂ are independently selected from phenyl and 5- to     7-membered aromatic heterocycles, each of which is unsubstituted or     substituted with from 1 to 3 substituents independently selected     from groups of the formula LR_(a); -   L is independently selected at each occurrence from a bond, —O—,     —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—,     —C(═O)NHR_(x), —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)—     and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected     at each occurrence from 0, 1 and 2; and R_(x) is independently     selected at each occurrence from hydrogen and C₁-C₈alkyl; -   R_(a) is independently selected at each occurrence from:     -   (i) hydrogen, halogen, cyano and nitro; and     -   (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether,         3- to 10-membered heterocycles, and (3- to 10-membered         heterocycle)C₁-C₆alkyl, each of which is unsubstituted or         substituted with from 1 to 9 substituents independently selected         from R_(b); -   R₃ and R₄ are:     -   (i) each independently selected from:         -   (a) hydrogen;         -   (b) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₁-C₈alkoxy,             C₃-C₈alkanone, C₂-C₈alkanoyl, C₂-C₈alkyl ether,             C₆-C₁₀arylC₀-C₈alkyl, 5- to 10-membered             heterocycleC₀-C₈alkyl and —(SO₂)C₁-C₈alkyl, each of which is             optionally substituted with from 1 to 9 substituents             independently selected from R_(b); and         -   (c) groups that are joined to an R₅ or R₆ to form a 4- to             10-membered heterocyclic group that is unsubstituted or             substituted with from 1 to 6 substituents independently             selected from R_(b); or     -   (ii) joined to form, with the N to which they are bound, a 4- to         10-membered heterocyclic group that is unsubstituted or         substituted with from 1 to 6 substituents independently selected         from R_(b), C₁-C₈alkanoyl, 4- to 7-membered         heterocycloalkylC₀-C₄alkyl, and mono- and         di-(C₁-C₆alkyl)aminoC₁-C₆alkyl; -   R₅ and R₆ are, independently at each occurrence:     -   (i) each independently selected from:         -   (a) hydrogen or hydroxy;         -   (b) C₁-C₈alkyl, unsubstituted or substituted with 1 or 2             substituents independently selected from R_(b); and         -   (c) groups that are joined to R₃ or R₄ to form a 4- to             10-membered heterocyclic group that is unsubstituted or             substituted with from 1 to 6 substituents independently             selected from R_(b);     -   (ii) taken together to form a keto group; or     -   (iii) joined to form a 3- to 7-membered carbocyclic or         heterocyclic ring, unsubstituted or substituted with from 1 to 4         substituents selected from R_(b); -   R_(b) is independently chosen at each occurrence from hydroxy,     halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl,     C₁-C₈alkoxy, C₁-C₈alkylthio, C₁-C₈alkyl ether, hydroxyC₁-C₈alkyl,     haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and     di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle     and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and -   n is 1, 2 or 3.

Such compounds are referred to herein as compounds of Formula IIIb.

In certain compounds of Formula IIIb, Ar₁ and Ar₂ are independently selected from phenyl and 6-membered aromatic heterocycles, each of which is substituted with 0, 1 or 2 substituents. In certain embodiments, (i) Ar₁ is phenyl or pyridyl, each of which is unsubstituted or substituted with 1 or 2 substituents selected from halogen, hydroxy, cyano, amino, nitro, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy; and (ii) Ar₂ is phenyl or pyridyl, each of which is unsubstituted or substituted with 1 or 2 substituents independently selected from halogen, hydroxy, cyano, amino, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy, haloC₁-C₆alkoxy, C₂-C₆alkyl ether, C₁-C₆alkanoyl, —(SO₂)R₂, —NR_(x)S(O)_(m)—, and —N(S(O_(m))₂; wherein m is 1 or 2, R_(x) is hydrogen or C₁-C₆alkyl, and R₂ is C₁-C₆alkyl, haloC₁-C₆alkyl, amino, mono- or di-(C₁-C₆alkyl)amino or a 5- to 10-membered, N-linked heterocyclic group, each of which R₂ is optionally substituted with R_(b). For example, in some embodiments, (i) Ar₁ is pyridyl, unsubstituted or substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl; and (ii) Ar₂ is phenyl or pyridyl, each of which is unsubstituted or substituted with halogen, cyano, C₁-C₄alkyl, haloC₁-C₄alkyl, C₂-C₄alkyl ether, C₁-C₄alkanoyl or —(SO₂)R_(a), wherein R_(a) is C₁-C₄alkyl or haloC₁-C₄alkyl. Certain such compounds are those in which (i) Ar₁ is pyridin-2-yl, 3-methyl-pyridin-2-yl, 3-trifluoromethyl-pyridin-2-yl or 3-halo-pyridin-2-yl; and (ii) Ar₂ is phenyl, 2-pyridyl or 3-pyridyl, each of which is substituted at the 4-position with trifluoromethanesulfonyl, propanesulfonyl, propane-2-sulfonyl, t-butyl, trifluoromethyl or 2,2,2-trifluoro-1-methyl-ethyl.

In certain compounds of Formula IIIb, R₃ and R₄ are each independently: (i) hydrogen; or (ii) C₁-C₈alkyl, C₂-C₈alkenyl, phenylC₀-C₄alkyl, indanylC₀-C₄alkyl, 5- to 6-membered heteroarylC₀-C₄alkyl, or 4- to 7-membered heterocycloalkylC₀-C₄alkyl, each of which is unsubstituted or substituted with from 1 to 4 substituents independently selected from hydroxy, halogen, amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy. In certain embodiments, R₃ and R₄ are each independently: (i) hydrogen; or (ii) C₁-C₆alkyl, C₂-C₆alkenyl, 5- to 7-membered heterocycloC₀-C₄alkyl, C₂-C₆alkyl ether, indanyl, benzyl, 1-phenyl-ethyl, 1-phenyl-propyl and 2-phenyl-ethyl, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from hydroxy, halogen and C₁-C₄alkyl. For example, one of R₃ and R₄ may be pyridylC₀-C₄alkyl, pyrimidylC₀-C₄alkyl, imidazolylC₀-C₄alkyl or tetrazolylC₀-C₄alkyl, each of which is substituted with 0, 1 or 2 substituents.

In other compounds of Formula IIIb, R₃ and R₄ are joined to form a 5 to 10-membered heterocyclic group that is substituted with from 0 to 4 substituents. In certain embodiments, the heterocyclic group is substituted with at least one substituent selected from hydroxy, halogen, C₁-C₄alkyl, haloC₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkoxy, C₁-C₄alkanoyl, and aminocarbonyl. In certain embodiments, the heterocyclic group comprises an aromatic ring. One heterocyclic group is 3,4-dihydro-1H-isoquinolin-2-yl, substituted with 0, 1 or 2 substituents. In other embodiments, the heterocyclic group is a 5- to 10-membered heterocycloalkyl, substituted with from 0 to 4 substituents. For example, the heterocycloalkyl may be piperadinyl, piperazinyl, pyrrolidinyl, azepanyl, azocinyl, decahydroquinolinyl or 1,4-dioxa-8-aza-spiro[4.5]dec-8-yl, each of which is unsubstituted or substituted with from 1 to 4 substituents independently selected from halogen, hydroxy, C₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkyl, haloC₁-C₄alkoxy, C₁-C₄alkanoyl and C₁-C₄alkoxycarbonyl. Still further heterocyclic groups include morpholino, thiomorpholino or 1,1-dioxo-thiomorpholin-4-yl, each of which is unsubstituted or substituted with from 1 to 4 substituents independently selected from halogen, hydroxy, C₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkyl, haloC₁-C₄alkoxy, C₁-C₄alkanoyl and C₁-C₄alkoxycarbonyl. Within certain compounds of Formula III in which R₃ and R₄ are joined to form a 5 to 10-membered heterocyclic group, the heterocyclic group is substituted with from 1 to 4 substituents independently selected from methyl and ethyl.

Within certain compounds of Formula IIIb, each R₅ and R₆ is independently selected from hydrogen and C₁-C₆alkyl. In certain such compounds, R₅ and R₆ are hydrogen.

Within certain compounds of Formula IIIb, n is 1.

Representative compounds of Formula IIIb include compounds wherein:

(i) V and X are N;

(ii) Ar₁ is pyridyl, unsubstituted or substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl;

(iii) Ar₂ is phenyl or pyridyl, unsubstituted or substituted with C₁-C₄alkyl, haloC₁-C₄alkyl or a group of the formula —(SO₂)R₂, wherein R₂ is C₁-C₄alkyl or haloC₁-C₄alkyl;

(iv) R₃ and R₄ are each independently selected from C₁-C₆alkyl, C₂-C₆alkenyl, C₂-C₆alkyl ether, 5- to 10-membered heteroarylC₀-C₄alkyl, phenylC₀-C₄alkyl and indanyl, each of which is substituted with 0, 1 or 2 substituents independently selected from hydroxy, halogen, C₁-C₄alkyl and haloC₁-C₄alkyl; and

(v) n is 1.

Yet other compounds of Formula IIIb include compounds wherein:

(i) V and X are N;

(ii) Ar₁ is pyridyl, unsubstituted or substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl;

(iii) Ar₂ is phenyl or pyridyl, unsubstituted or substituted with C₁-C₄alkyl, haloC₁-C₄alkyl or a group of the formula —(SO₂)R₂, wherein R₂ is C₁-C₄alkyl or haloC₁-C₄alkyl;

(iv) R₃ and R₄ are joined to form a 5- to 10-membered heterocyclic group that is unsubstituted or substituted with from 1 to 3 substituents; and

(v) n is 1.

Preferred compounds of Formulas Ib, IIb and IIIb have an IC₅₀ value of 100 nanomolar or less, 10 nanomolar or less or 1 nanomolar or less in a capsaicin receptor calcium mobilization assay.

In another aspect, the invention provides pharmaceutical compositions, comprising at least one compound or salt according to Formula Ib, IIb or IIIb in combination with a physiologically acceptable carrier or excipient.

Within each of the methods described herein, the VR1 modulator(s) employed may satisfy one or more of the following formulas: I, II, III, IV, Ia, IIa, IIIa, IVa, Ib, IIb, IIIb or IVb. Certain such modulators satisfy Formula I, in which:

-   V, X, W, Y and Z are each independently N or CR₁, with the proviso     that at least one of V and X is N; -   U is N or CR₂, with the proviso that if V and X are N, then U is     CR₂; -   R₁ is independently selected at each occurrence from hydrogen,     halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl,     C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; -   R₂ is:     -   (i) hydrogen, halogen or cyano;     -   (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is         unsubstituted or substituted with from 1 to 9 substituents         independently selected from R_(d); or     -   (iii) a group of the formula —R_(c)-M-A-R_(y), wherein:         -   R_(c) is C₀-C₃alkyl;         -   M is a bond, N(R_(z)), S, SO₂, (C═O)_(p)N(R_(z)),             N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is             0 or 1;         -   A is a bond or C₁-C₈alkyl, optionally substituted with from             1 to 3 substituents independently selected from R_(d); and         -   R_(y) and R_(z), if present, are:             -   (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkenyl,                 C₂-C₈alkynyl, C₆-C₁₀arylC₀-C₈alkyl, a 4- to 10-membered                 carbocycle, or joined to R_(c) to form a 4- to                 10-membered carbocycle, wherein each R_(y) and R_(z) is                 independently unsubstituted or substituted with from 1                 to 9 substituents independently selected from R_(d); or             -   (b) joined to form a 4- to 10-membered heterocycle that                 is unsubstituted or substituted with from 1 to 9                 substituents independently selected from R_(d);     -    wherein R_(d) is independently selected at each occurrence from         hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro,         C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl,         phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino,         (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to         7-membered heterocycle) (C₁-C₈alkyl); -   Ar₁ and Ar₂ are independently selected from 5- to 10-membered     aromatic carbocycles and heterocycles, each of which is     unsubstituted or substituted with from 1 to 3 substituents     independently selected from groups of the formula LR_(a); -   L is independently selected at each occurrence from a bond, —O—,     —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—,     —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)—     and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected     at each occurrence from 0, 1 and 2; and R_(x) is independently     selected at each occurrence from hydrogen and C₁-C₈alkyl; -   R_(a) is independently selected at each occurrence from:     -   (i) hydrogen, halogen, cyano and nitro; and     -   (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether,         3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino         and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is         unsubstituted or substituted with from 1 to 9 substituents         independently selected from R_(b); and -   R_(b) is independently chosen at each occurrence from hydroxy,     halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl,     C₁-C₈alkoxy, C₁-C₈alkylthio, C₁-C₈alkyl ether, hydroxyC₁-C₈alkyl,     haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and     di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle     and (5- to 7-membered heterocycle) (C₁-C₈alkyl).     Terminology

Compounds are generally described herein using standard nomenclature. For compounds having asymmetric centers, it should be understood that (unless otherwise specified) all of the optical isomers and mixtures thereof are encompassed. In addition, compounds with carbon-carbon double bonds may occur in Z- and E-forms, with all isomeric forms of the compounds being included in the present invention unless otherwise specified. Where a compound exists in various tautomeric forms, a recited compound is not limited to any one specific tautomer, but rather is intended to encompass all tautomeric forms. Certain compounds are described herein using a general formula that includes variables (e.g., R₁, n, Ar₁). Unless otherwise specified, each variable within such a formula is defined independently of any other variable, and any variable that occurs more than one time in a formula is defined independently at each occurrence.

The term “quinazolin-4-ylamine analogue,” as used herein, encompasses all compounds that satisfy one or more of Formulas I-IV herein, as well as pharmaceutically acceptable salts and hydrates of such compounds. Such compounds include analogues in which the quinazoline core is modified in the number and/or placement of ring nitrogen atoms, as well as analogues in which varied substituents, as described in more detail below, are attached to such a core structure. In other words, compounds that are pyrido[2,3-d]pyrimidine-4-ylamines, pyrido[3,2-d]pyrimidin-4-ylamines, isoquinolin-1-ylamines and phthalazin-1-ylamines are within the scope of quinazolin-4ylamine analogues.

As used herein, the term “alkyl” refers to a straight chain, branched chain or cyclic saturated aliphatic hydrocarbon. An alkyl group may be bonded to an atom within a molecule of interest via any chemically suitable portion. Alkyl groups include groups having from 1 to 8 carbon atoms (C₁-C₈alkyl), from 1 to 6 carbon atoms (C₁-C₆alkyl) and from 1 to 4 carbon atoms (C₁-C₄alkyl), such as methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, 2-pentyl, isopentyl, neopentyl, hexyl, 2-hexyl, 3-hexyl, 3-methylpentyl, cyclopropyl, cyclopropylmethyl, cyclopentyl, cyclopentylmethyl, cyclohexyl, cycloheptyl and norbornyl. “C₀-C₄alkyl” refers to a bond or a C₁-C₄alkyl group; “C₀-C₈alkyl” refers to a bond or a C₁-C₈alkyl group.

Similarly, “alkenyl” refers to straight or branched chain alkene groups or cycloalkene groups. Within an alkenyl group, one or more unsaturated carbon-carbon double bonds are present. Alkenyl groups include C₂-C₈alkenyl, C₂-C₆alkenyl and C₂-C₄alkenyl groups, which have from 2 to 8, 2 to 6 or 2 to 4 carbon atoms, respectively, such as ethenyl, allyl or isopropenyl. “Alkynyl” refers to straight or branched chain alkyne groups, which have, one or more unsaturated carbon-carbon bonds, at least one of which is a triple bond. Alkynyl groups include C₂-C₈alkynyl, C₂-C₆alkynyl and C₂-C₄alkynyl groups, which have from 2 to 8, 2 to 6 or 2 to 4 carbon atoms, respectively.

By “alkoxy,” as used herein, is meant an alkyl, alkenyl or alkynyl group as described above attached via an oxygen bridge. Alkoxy groups include C₁-C₈alkoxy, C₁-C₆alkoxy and C₁-C₄alkoxy groups, which have from 1 to 8, 1 to 6 or 1 to 4 carbon atoms, respectively. Alkoxy groups include, for example, methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, n-pentoxy, 2-pentoxy, 3-pentoxy, isopentoxy, neopentoxy, hexoxy, 2-hexoxy, 3-hexoxy, and 3-methylpentoxy.

The term “alkanoyl” refers to an acyl group in a linear, branched or cyclic arrangement (e.g., —(C═O)-alkyl). Alkanoyl groups include C₂-C₈alkanoyl, C₂-C₆alkanoyl and C₂-C₄alkanoyl groups, which have from 2 to 8, 2 to 6 or 2 to 4 carbon atoms, respectively. “C₁alkanoyl” refers to —(C═O)—H, which (along with C₂-C₈alkanoyl) is encompassed by the term “C₁-C₈alkanoyl.”

An “alkanone” is a ketone group in which carbon atoms are in a linear, branched or cyclic alkyl arrangement. “C₃-C₈alkanone,” “C₃-C₆alkanone” and “C₃-C₄alkanone” refer to an alkanone having from 3 to 8, 6 or 4 carbon atoms, respectively. By way of example, a C₃ alkanone group has the structure —CH₂—(C═O)—CH₃.

Similarly, “alkyl ether” refers to a linear or branched ether substituent linked via a carbon-carbon bond. Alkyl ether groups include C₂-C₈alkyl ether, C₂-C₆alkyl ether and C₂-C₆alkyl ether groups, which have 2 to 8, 6 or 4 carbon atoms, respectively. By way of example, a C₂ alkyl ether group has the structure —CH₂—O—CH₃.

The term “alkoxycarbonyl” refers to an alkoxy group linked via a carbonyl (i.e., a group having the general structure —C(═O)—O-alkyl). Alkoxycarbonyl groups include C₂-C₈, C₂-C₆ and C₂-C₄alkoxycarbonyl groups, which have from 2 to 8, 6 or 4 carbon atoms, respectively. “C₁alkoxycarbonyl” refers to —C(═O)—OH, which is encompassed by the term “C₁-C₈alkoxycarbonyl.”

“Alkanoyloxy,” as used herein, refers to an alkanoyl group linked via an oxygen bridge (i.e., a group having the general structure —O—C(═O)-alkyl). Alkanoyloxy groups include C₂-C₈, C₂-C₆ and C₂-C₄alkanoyloxy groups, which have from 2 to 8, 6 or 4 carbon atoms, respectively. “C₁alkanoyloxy” refers to O—C(═O)—H, which is encompassed by the term “C₁-C₈alkanoyloxy.”

The term “C₁-C₈carbonate” refers to an alkoxycarbonyl group linked via an oxygen bridge. In other words, a carbonate group has the general structure —O—C(═O)—O-alkyl. C₁-C₆carbonate groups are generally preferred, with C₁-C₄carbonate groups particularly preferred.

The term “C₁-C₈carbamate,” as used herein, refers to a group having the general structure —N—C(═O)—O-alkyl. C₁-C₆carbamate groups, i.e., where the alkyl group is a C₁-C₆ alkyl, are generally preferred, with C₁-C₄carbamate groups particularly preferred.

Alkylamino refers to a secondary or tertiary amine having the general structure —NH-alkyl or —N(alkyl)(alkyl), wherein each alkyl may be the same or different. Such groups include, for example, mono- and di-(C₁-C₈alkyl)amino groups, in which each alkyl may be the same or different and may contain from 1 to 8 carbon atoms, as well as mono- and di-(C₁-C₆alkyl)amino groups and mono- and di-(C₁-C₄alkyl)amino groups. Alkylaminoalkyl refers to an alkylamino group linked via an alkyl group (i.e., a group having the general structure -alkyl-NH-alkyl or -alkyl-N(alkyl)(alkyl)). Such groups include, for example, mono- and di-(C₁-C₈alkyl)aminoC₁-C₈alkyl, mono- and di-(C₁-C₆alkyl)aminoC₁-C₆alkyl and mono- and di-(C₁-C₄alkyl)aminoC₁-C₄alkyl, in which each alkyl may be the same or different.

The term “aminocarbonyl” refers to an amide group (i.e., —(C═O)NH₂).

The term “halogen” includes fluorine, chlorine, bromine and iodine. A “haloalkyl” is a branched, straight-chain or cyclic alkyl group, substituted with 1 or more halogen atoms (e.g., “haloC₁-C₈alkyl” groups have from 1 to 8 carbon atoms; “haloC₁-C₆alkyl” groups have from 1 to 6 carbon atoms). Examples of haloalkyl groups include, but are not limited to, mono-, di- or tri-fluoromethyl; mono-, di- or tri-chloromethyl; mono-, di-, tri-, tetra- or penta-fluoroethyl; and mono-, di-, tri-, tetra- or penta-chloroethyl. Typical haloalkyl groups are trifluoromethyl and difluoromethyl. Within certain compounds provided herein, not more than 5 or 3 haloalkyl groups are present. The term “haloalkoxy” refers to a haloalkyl group as defined above attached via an oxygen bridge. “HaloC₁-C₈alkoxy” groups have 1 to 8 carbon atoms.

A dash (“-”) that is not between two letters or symbols is used to indicate a point of attachment for a substituent. For example, —CONH₂ is attached through the carbon atom.

A “heteroatom,” as used herein, is oxygen, sulfur or nitrogen.

A “carbocycle” or “carbocyclic group” comprises at least one ring formed entirely by carbon-carbon bonds (referred to herein as a carbocyclic ring), and does not contain a heterocyclic ring. Unless otherwise specified, each carbocyclic ring within a carbocycle may be saturated, partially saturated or aromatic. A carbocycle generally has from 1 to 3 fused, pendant or spiro rings, carbocycles within certain embodiments have one ring or two fused rings. Typically, each ring contains from 3 to 8 ring members (i.e., C₃-C₈); C₅-C₇ rings are recited in certain embodiments. Carbocycles comprising fused, pendant or spiro rings typically contain from 9 to 14 ring members. Certain representative carbocycles are cycloalkyl (i.e., groups that comprise saturated and/or partially saturated rings, such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, decahydro-naphthalenyl, octahydro-indenyl, and partially saturated variants of any of the foregoing, such as cyclohexenyl), as well as aromatic groups (i.e., groups that contain at least one aromatic carbocyclic ring, such as phenyl, benzyl, naphthyl, phenoxyl, benzoxyl, phenylethanonyl, fluorenyl, indanyl and 1,2,3,4-tetrahydro-naphthyl. Carbon atoms present within a carbocyclic ring may, of course, be further bonded to zero, one or two hydrogen atoms and/or any of a variety of ring substituents, such as hydroxy, halogen, cyano, nitro, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-Calkynyl, C₁-C₈alkoxy, C₂-C₈alkyl ether, C₃-C₈alkanone, C₁-C₈alkylthio, amino, mono- or di-(C₁-C₈alkyl)amino, C₃-C₇cycloalkylC₀-C₄alkyl, haloC₁-C₈alkyl, haloC₁-C₈alkoxy, aminoC₁-C₈alkyl, hydroxyC₁-C₈alkyl, C₁-C₈alkanoyl, C₁-C₈alkoxycarbonyl, —COOH, —C(═O)NH₂, mono- or di-(C₁-C₈alkyl)carboxamido, —S(O₂)NH₂, and/or mono- or di-(C₁-C₈alkyl)sulfonamido.

Certain carbocycles recited herein include C₆-C₁₀arylC₀-C₈alkyl groups (i.e., groups in which a carbocyclic group comprising at least one aromatic ring is linked via a direct bond or a C₁-C₈alkyl group). Such groups include, for example, phenyl and indanyl, as well as groups in which either of the foregoing is linked via C₁-C₈alkyl, preferably via C₁-C₄alkyl. Phenyl groups linked via a direct bond or alkyl group may be designated phenylC₀-C₈alkyl (e.g., benzyl, 1-phenyl-ethyl, 1-phenyl-propyl and 2-phenyl-ethyl).

A “heterocycle” or “heterocyclic group” has from 1 to 3 fused, pendant or spiro rings, at least one of which is a heterocyclic ring (i.e., one or more ring atoms is a heteroatom, with the remaining ring atoms being carbon). Typically, a heterocyclic ring comprises 1-4 heteroatoms; within certain embodiments each heterocyclic ring has 1 or 2 heteroatoms per ring. Each heterocyclic ring generally contains from 3 to 8 ring members (rings having from 5 to 7 ring members are recited in certain embodiments), and heterocycles comprising fused, pendant or spiro rings typically contain from 9 to 14 ring members. Heterocycles may be optionally substituted at nitrogen and/or carbon atoms with a variety of substituents, such as those described above for carbocycles. Unless otherwise specified, a heterocycle may be a heterocycloalkyl group (i.e., each ring is saturated or partially saturated) or a heteroaryl group (i.e., at least one ring within the group is aromatic). A heterocyclic group may generally be linked via any ring or substituent atom, provided that a stable compound results. N-linked heterocyclic groups are linked via a component nitrogen atom. A “heterocycleC₀-C₈alkyl” is a heterocyclic group linked via a direct bond or C₁-C₈alkyl group. A (3- to 10-membered heterocycle)C₁-C₆alkyl is a heterocyclic group having from 3 to 10 ring members linked via a C₁-C₆alkyl group

Heterocyclic groups include, for example, acridinyl, azepanyl, azocinyl, benzimidazolyl, benzimidazolinyl, benzisothiazolyl, benzisoxazolyl, benzofuranyl, benzothiofuranyl, benzothiophenyl, benzoxazolyl, benzothiazolyl, benzotriazolylcarbazolyl, benztetrazolyl, NH-carbazolyl, carbolinyl, chromanyl, chromenyl, cinnolinyl, decahydroquinolinyl, dihydrofuro[2,3-b]tetrahydrofuran, dihydroisoquinolinyl, dihydrotetrahydrofuranyl, 1,4-dioxa-8-aza-spiro[4.5]dec-8-yl, dithiazinyl, furanyl, furazanyl, imidazolinyl, imidazolidinyl, imidazolyl, indazolyl, indolenyl, indolinyl, indolizinyl, indolyl, isobenzofuranyl, isochromanyl, isoindazolyl, isoindolinyl, isoindolyl, isothiazolyl, isoxazolyl, isoquinolinyl, morpholinyl, naphthyridinyl, octahydroisoquinolinyl, oxadiazolyl, oxazolidinyl, oxazolyl, phenanthridinyl, phenanthrolinyl, phenazinyl, phenothiazinyl, phenoxathiinyl, phenoxazinyl, phthalazinyl, piperazinyl, piperidinyl, piperidinyl, piperidonyl, pteridinyl, purinyl, pyranyl, pyrazinyl, pyrazolidinyl, pyrazolinyl, pyrazolyl, pyridazinyl, pyridoimidazolyl, pyridooxazolyl, pyridothiazolyl, pyridyl, pyrimidyl, pyrrolidinyl, pyrrolidonyl, pyrrolinyl, pyrrolyl, quinazolinyl, quinolinyl, quinoxalinyl, quinuclidinyl, tetrahydroisoquinolinyl, tetrahydroquinolinyl, tetrazolyl, thiadiazinyl, thiadiazolyl, thianthrenyl, thiazolyl, thienothiazolyl, thienooxazolyl, thienoimidazolyl, thienyl, thiophenyl, thiomorpholinyl and variants thereof in which the sulfur atom is oxidized, triazinyl, xanthenyl and any of the foregoing that are substituted with from 1 to 4 substituents as described above.

Certain heterocyclic groups are 3- to 10-membered or 5- to 10-membered groups that contain 1 heterocyclic ring or 2 fused or spiro rings, optionally substituted as described above. (C₃-C₁₀)heterocycloalkyls include, for example, piperidinyl, piperazinyl, pyrrolidinyl, azepanyl, 1,4-dioxa-8-aza-spiro[4.5]dec-8-yl, morpholino, thiomorpholino, and 1,1-dioxo-thiomorpholin-4-yl, as well as groups in which each of the foregoing is substituted with from 1 to 6 (preferably from 1 to 4) substituents independently selected from halogen, hydroxy, C₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkyl, haloC₁-C₄alkoxy, C₁-C₄alkylcarbonyl and C₁-C₄alkoxycarbonyl. In certain embodiments, a heterocycloalkyl may be a 4- to 7-membered heterocycloalkylC₀-C₄alkyl group. Such groups comprise a 4- to 7-membered heterocycloalkyl group as described above, linked via a direct bond or a C₁-C₄ alkyl group.

Certain aromatic heterocycles include 5- to 10-membered heteroarylC₀-C₈alkyl groups (i.e., groups in which the heterocyclic group comprising at least one aromatic ring is linked via a direct bond or a C₁-C₈alkyl group). Such groups include, for example, the heteroaryl groups recited above, as well as groups in which any of the foregoing is linked via C₁-C₈alkyl, C₁-C₆alkyl or C₁-C₄alkyl. Representative aromatic heterocycles are azocinyl, pyridyl, pyrimidyl, imidazolyl, tetrazolyl and 3,4-dihydro-1H-isoquinolin-2-yl, as well as groups in which each of the foregoing is linked via C₁-C₄alkyl.

A “substituent,” as used herein, refers to a molecular moiety that is covalently bonded to an atom within a molecule of interest. For example, a “ring substituent” may be a moiety such as a halogen, alkyl group, haloalkyl group or other group discussed herein that is covalently bonded to an atom (preferably a carbon or nitrogen atom) that is a ring member. The term “substitution” refers to replacing a hydrogen atom in a molecular structure with a substituent as described above, such that the valence on the designated atom is not exceeded, and such that a chemically stable compound (i.e., a compound that can be isolated, characterized, and tested for biological activity) results from the substitution.

Groups that are “optionally substituted” are unsubstituted or are substituted by other than hydrogen at one or more available positions, typically 1, 2, 3, 4 or 5 positions, by one or more suitable groups (which may be the same or different). Such optional substituents include, for example, hydroxy, halogen, cyano, nitro, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₁-C₈alkoxy, C₂-C₈alkyl ether, C₃-C₈alkanone, C₁-C₈alkylthio, amino, mono- or di-(C₁-C₈alkyl)amino, haloC₁-C₈alkyl, haloC₁-C₈alkoxy, C₁-C₈alkanoyl, C₁-C₈alkanoyloxy, C₁-C₈alkoxycarbonyl, —COOH, —CONH₂, mono- or di-(C₁-C₈alkyl)carboxamido, —SO₂NH₂, and/or mono or di(C₁-C₈alkyl)sulfonamido, as well as carbocyclic and heterocyclic groups. Certain optionally substituted groups are substituted with from 0 to 3 independently selected substituents.

The terms “VR1,” “type 1 vanilloid receptor” and “capsaicin receptor” are used interchangeably herein. Unless otherwise specified, these terms encompass both rat and human VR1 receptors (e.g., GenBank Accession Numbers AF327067, AJ277028 and NM_(—)018727; sequences of certain human VR1 cDNAs are provided in SEQ ID NOs:1-3, and the encoded amino acid sequences shown in SEQ ID NOs:4 and 5, of U.S. Pat. No. 6,482,611), as well as homologs thereof found in other species.

A “VR1 modulator,” also referred to herein as a “modulator,” is a compound that modulates VR1 activation and/or VR1-mediated signal transduction. A VR1 modulator may be a VR1 agonist or antagonist although, for certain purposes described herein, a VR1 modulator preferably inhibits VR1 activation resulting from binding of a vanilloid ligand agonist (e.g., capsaicin or a capsaicin analogue such as olvanil or resiniferatoxin) to VR1. A modulator binds with “high affinity” if the K_(i) at VR1 is less than 1 micromolar, preferably less than 100 nanomolar, 10 nanomolar or 1 nanomolar. A representative assay for determining K_(i) at VR1 is provided in Example 5, herein. A modulator is considered an antagonist if it detectably inhibits vanilloid ligand binding to VR1 and/or VR1-mediated signal transduction (using, for example, the representative assay provided in Example 6); in general, such an antagonist inhibits VR1 activation with a IC₅₀ value of less than 1 micromolar, preferably less than 100 nanomolar, and more preferably less than 10 nanomolar or 1 nanomolar within the assay provided in Example 6. VR1 antagonists include neutral antagonists and inverse agonists. Preferred modulators do not substantially inhibit activity of human epidermal growth factor (EGF) receptor tyrosine kinase (i.e., IC₅₀ in an EGF receptor assay is greater than 1 micromolar, preferably greater than 100 micromolar or 10 micromolar). More preferably, a modulator does not detectably inhibit EGF receptor activity. Assays for detecting an inhibitory effect on EGF receptor are well known in the art, and include those described by Carpenter et al. (1979) J. Biol. Chem. 254:4884, as well as U.S. Pat. Nos. 5,654,307 and 6,169,091.

An “inverse agonist” of VR1 is a compound that inhibits the activity of vanilloid ligand at VR1, and reduces the activity of VR1 below its basal activity level in the absence of added vanilloid ligand. Inverse agonists of VR1 may also inhibit binding of vanilloid ligand to VR1. The ability of a compound to inhibit the binding of vanilloid ligand to VR1 may be measured by a binding assay, such as the binding assay given in Example 5. The basal activity of VR1, as well as the reduction in VR1 activity due to the presence of VR1 antagonist, may be determined from a calcium mobilization assay, such as the assay of Example 6.

A “neutral antagonist” of VR1 is a compound that inhibits the activity of vanilloid ligand at VR1, but does not significantly change the basal activity of the receptor (i.e., within a calcium mobilization assay as described in Example 6 performed in the absence of vanilloid ligand, VR1 activity is reduced by no more than 10%, more preferably by no more than 5%, and even more preferably by no more than 2%; most preferably, there is no detectable reduction in activity. Neutral antagonists of VR1 may inhibit the binding of vanilloid ligand to VR1.

As used herein an “agonist” of VR1 is a compound that elevates the activity of the receptor above the basal activity level of the receptor.

A “vanilloid ligand” is capsaicin or any capsaicin analogue that comprises a phenyl ring with two oxygen atoms bound to adjacent ring carbons, and that binds to VR1 with a K_(i) (determined as described herein) that is no greater than 10 μM. Vanilloid ligand agonists include capsaicin, olvanil, N-arachidonoyl-dopamine and resiniferatoxin (RTX). Vanilloid ligand antagonists include capsazepine and iodo-resiniferatoxin.

A “prodrug” is a compound that may not fully satisfy the structural requirements of the compounds provided herein, but is modified in vivo, following administration to a patient, to produce a quinazolin-4-ylamine analogue. For example, a prodrug may be an acylated derivative of a compound as provided herein. Prodrugs include compounds wherein hydroxy, amine or sulfhydryl groups are bonded to any group that, when administered to a mammalian subject, cleaves to form a free hydroxyl, amino, or sulfhydryl group, respectively. Examples of prodrugs include, but are not limited to, acetate, formate and benzoate derivatives of alcohol and amine functional groups within the compounds provided herein.

A “patient” is any individual treated with a VR1 modulator as provided herein. Patients include humans, as well as other animals such as companion animals (e.g., dogs and cats) and livestock. Patients may be experiencing one or more symptoms of a condition responsive to capsaicin receptor modulation (e.g., pain, exposure to vanilloid ligand, itch, urinary incontinence, respiratory disorders, cough and/or hiccup), or may be free of such symptom(s) (i.e., treatment may be prophylactic).

VR1Modulators

As noted above, the present invention provides VR1 modulators (i.e., compounds that modulate VR1-mediated signal transduction; preferably compounds that also detectably bind to VR1). VR1 modulators may be used to modulate VR1 activity in a variety of contexts, including in the treatment of (i) pain (e.g., neuropathic or peripheral nerve-mediated pain), (ii) exposure to capsaicin, (iii) exposure to acid, heat, light, tear gas air pollutants, pepper spray or related agents, (iv) respiratory conditions such as asthma or chronic obstructive pulmonary disease, (v) itch, (vi) urinary incontinence, (vii) cough or hiccup and/or (viii) obesity. VR1 modulators may also be used within a variety of in vitro assays (e.g., assays for receptor activity), as probes for detection and localization of VR1 and as standards in assays of ligand binding and VR1-mediated signal transduction.

VR1 modulators provided herein are substituted quinazolin-4-ylamine analogues that detectably modulate the binding of capsaicin to VR1 at nanomolar (i.e., submicromolar) concentrations, preferably at subnanomolar concentrations, more preferably at concentrations below 100 picomolar, or even below 20 picomolar. Such modulators are preferably not capsaicin analogs (i.e., they do not comprise a phenyl ring with two oxygen atoms bound to adjacent ring carbons). Preferred modulators are VR1 antagonists and have no detectable agonist activity in the assay described in Example 6. In certain embodiments, such modulators further bind with high affinity to VR1, and do not substantially inhibit activity of human EGF receptor tyrosine kinase.

The present invention is based, in part, on the discovery that small molecules having the general Formula I (as well as pharmaceutically acceptable salts, hydrates and prodrugs thereof). modulate VR1 activity. In certain embodiments, no more than 2 of W, Y and Z are N. Representative quinazoline-4-ylamine analogues include, but are not limited to, compounds in which U, V, W, X, Y and Z are as indicated for any one of the embodiments listed in Table I. TABLE I Representative Quinazoline-4-ylamine Analogue Core Structures U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH CR₂ N N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH CR₂ N N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N CR₂ N N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH CR₂ N N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N

Within Formulas I-IV, R₁ is preferably hydrogen, C₁-C₄alkyl or haloC₁-C₄alkyl, with hydrogen particularly preferred. Further, V and X may both be N. Within certain such embodiments, one of W, Y and Z is N and the others are CH, or all three of W, Y and Z are CH.

In certain embodiments, R₂ in Formulas I and II, if present, is hydrogen, amino, hydroxy, halogen, or optionally substituted —(CH₂)_(n)NH₂, —(CH₂)_(n)NH(C₁-C₈alkyl), —(CH₂)_(n)N(C₁-C₈alkyl)₂, —(CH₂)_(n)(5- to 8-membered heterocycloalkyl), or —(CH₂)_(n)OH. Optionally substituted groups include, for example, unsubstituted groups and groups substituted on the alkyl portion with from 1 to 4 substituents independently chosen from halogen, cyano, hydroxy, amino, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, and haloC₁-C₆alkyl. Heterocycloalkyl groups include those in which the heterocycloalkyl comprises a nitrogen or oxygen atom directly linked to the —(CH₂)_(n).

Within certain embodiments, Ar₁ and Ar₂ in compounds of Formulas I-IV are independently selected from 5- to 7-membered aromatic carbocycles and heterocycles, optionally substituted. For example, Ar₁ and Ar₂ may be independently selected from phenyl and 6-membered aromatic heterocycles, each of which is substituted with 0, 1 or 2 substituents. In certain embodiments, Ar₁ is phenyl or pyridyl, each of which is unsubstituted or substituted with 1, 2 or 3 substituents as described above; preferably such substituents, if any, are independently selected from halogen, hydroxy, cyano, amino, nitro, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy. For example, Ar₁ may contain one substituent selected from halogen, C₁-C₆alkyl, C₁-C₆alkoxy, haloC₁-C₆alkyl and haloC₁-C₆alkoxy. If one or more Ar₁ substituents is present, at least one such substituent is preferably located in the ortho position (e.g., Ar₁ may be phenyl substituted at the 2-position, or 2-pyridyl substituted at the 3-position). Ar₁ groups include, but are not limited to, pyridin-2-yl, 3-methyl-pyridin-2-yl, 3-trifluoromethyl-pyridin-2-yl and 3-halo-pyridin-2-yl.

Ar₂, within certain embodiments, is phenyl or pyridyl, each of which is unsubstituted or substituted with 1 or 2 substituents as described above. In certain embodiments, one such substituent is located in the para position of a 6-membered Ar₂; in Formula II the —SO₂—R₇ is preferably in the para position, and in Formulas I, III and IV one of the optional substituents is preferably located in that position. Optional Ar₂ substituents are as described above and include, for example, groups in which R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl and 3- to 10-membered heterocycles, each of which is optionally substituted with from 1 to 9 substituents independently selected from hydroxy, halogen, C₁-C₆alkyl and haloC₁-C₆alkyl. Preferred R_(a) moieties include halogen, hydroxy, cyano, amino, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy, haloC₁-C₆alkoxy, C₂-C₆alkyl ether, C₁-C₆alkanoyl, —(SO₂)R_(a), —NR_(x)S(O)_(m), and —N(S(O)_(m))₂; wherein m is 1 or 2, R_(x) is hydrogen or C₁-C₆alkyl, and R_(a) is C₁-C₆alkyl, haloC₁-C₆alkyl, or a 5- to 10-membered, N-linked heterocyclic group, each of which R_(a) is optionally substituted with from 1 to 4 substituents independently chosen from R_(b). Preferred Ar₂ substituents include C₁-C₄alkyl, haloC₁-C₄alkyl and groups of the formula —(SO₂)R_(a), wherein R_(a) is C₁-C₄alkyl or haloC₁-C₄alkyl. Ar₂ groups include phenyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, pyrrolyl, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl and thiadiazolyl, each of which is optionally substituted with 1 or 2 substituents independently selected from halogen, cyano, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy, haloC₁-C₆alkoxy, —SO₂—R_(a) and —SO₂NR_(x)—R_(a). Preferred Ar₂ groups are phenyl, pyridyl, isoxazolyl, thiadiazolyl and pyrazolyl, optionally substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl. Within certain embodiments, Ar₂ is phenyl or pyridyl, each of which is optionally substituted with 1 or 2 substituents independently chosen from halogen, cyano, C₁-C₄alkyl, haloC₁-C₄alkyl, C₂-C₄alkyl ether, C₁-C₄alkanoyl and groups of the formula —(SO₂)R_(a), wherein R_(a) is C₁-C₆alkyl or haloC₁-C₆alkyl. Ar₂ groups include, but are not limited to, phenyl, 2-pyridyl and 3-pyridyl, each of which is substituted at the 4-position with halogen, cyano, methyl, ethyl, propyl, isopropyl, t-butyl, trifluoromethyl, 2,2,2-trifluoroethyl, 2,2,2-trifluoro-1-methyl-ethyl, methanesulfonyl, ethanesulfonyl, propanesulfonyl, propane-2-sulfonyl, trifluoromethanesulfonyl or 2,2,2-trifluoroethanesulfonyl.

Within certain embodiments of compounds of Formula II, Ar₂ is phenyl or pyridyl, optionally substituted with 1 or 2 substituents independently chosen from halogen, cyano, C₁-C₆alkyl, and haloC₁-C₆alkyl; and Ar₁ is phenyl or pyridyl, optionally substituted with halogen, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy or haloC₁-C₆alkoxy. Within Formula II, the carbon atom of Ar₂ that is linked to the SO₂ is preferably separated from the carbon atom linked to the N by at least one, and preferably two, ring atoms. In other words, for embodiments in which Ar₂ is phenyl, the SO₂ is preferably located at the para (4) position. In certain embodiments, R₇ is C₁-C₆alkyl, haloC₁-C₆alkyl, amino, mono or di(C₁-C₆alkyl)amino or a nonaromatic heterocycle (e.g., morpholinyl, piperidinyl, piperazinyl or pyrrolidinyl), optionally substituted as described above.

Within certain embodiments, R₃ and R₄ of Formula III are each independently selected from (i) hydrogen or (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₃-C₈alkanone, C₁-C₈alkanoyl, C₂-C₈alkyl ether, C₆-C₁₀arylC₀-C₈alkyl, 5- to 10-membered heterocycleC₀-C₈alkyl and —(SO₂)C₁-C₈alkyl, each of which is optionally substituted with from 1 to 9 substituents independently selected from R_(b). Within other embodiments, R₃ and R₄ are each independently selected from (i) hydrogen and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, phenylC₀-C₄alkyl, indanylC₀-C₄alkyl, 5- to 6-membered heteroarylC₀-C₄alkyl and 4- to 7-membered heterocycloalkylC₀-C₄alkyl, each of which is optionally substituted with from 1 to 4 substituents independently selected from hydroxy, halogen, amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy. Representative R₃ and R₄ groups include C₁-C₆alkyl, C₂-C₆alkenyl, 5- to 7-membered heterocycloC₀-C₄alkyl, C₂-C₆alkyl ether, indanyl, benzyl, 1-phenyl-ethyl, 1-phenyl-propyl and 2-phenyl-ethyl, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from hydroxy, halogen and C₁-C₄alkyl. For example, at least one of R₃ and R₄ may be pyridylC₀-C₄alkyl, pyrimidylC₀-C₄alkyl, imidazolylC₀-C₄alkyl or tetrazolylC₀-C₄alkyl, each of which is substituted with 0, 1 or 2 substituents. Alternatively, R₃ and/or R may be joined to an R₅ or R₆ group (along with the N to which R₃ and R₄ are bound and any carbon atoms between the N and R₅ or R₆) to form an optionally substituted heterocycle, such as a 5- to 10-membered mono- or bi-cyclic group.

Within other embodiments, R₃ and/or R₄ of Formula III may form an optionally substituted heterocycle. For example, R₃ and R₄ may be joined to form, with the N to which they are bound, an optionally substituted heterocycle; or R₃ or R may be joined to an R₅ or R₆ moiety to from an optionally substituted heterocycle. In either case, the resulting heterocycle may be, for example, a 4- or 5- to 10-membered, mono- or bi-cyclic group substituted with from 0 to 4 substituents (e.g., from 1 to 4 substituents or 0, 1 or 2 substituents). In certain embodiments, each substituent is independently selected from hydroxy, halogen, C₁-C₄alkyl, haloC₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkoxy, C₁-C₄alkanoyl, C₁-C₄alkoxycarbonyl, aminocarbonyl, heterocycleC₀-C₈alkyl and heterocycleC₁-C₈alkoxycarbonyl. In certain embodiments, such substituents are lower alkyl groups such as methyl and/or ethyl.

A heterocyclic group that comprises R₃ and/or R may be a heteroaryl group, which comprises an aromatic ring (e.g., optionally substituted acridinyl, benzimidazolinyl, benzimidazolyl, benzotriazolyl, carbazolyl, cinnolinyl, indazolyl, indolinyl, indolyl, isoquinolinyl, quinoxalinyl, naphthyridinyl, phenanthridinyl, phenazinyl, phenothiazinyl, phenoxazinyl, phthalazinyl, pteridinyl, purinyl, quinolinyl, quinoxalinyl, quinazolinyl, tetrahydroisoquinolinyl or tetrahydroquinolinyl). One such heteroaryl is 3,4-dihydro-1H-isoquinolin-2-yl. Alternatively, the heterocycle may be an optionally substituted heterocycloalkyl group, such as azepanyl, azocinyl, decahydroquinolinyl, 1,4-dioxa-8-aza-spiro[4.5]dec-8-yl, imidazolidinyl, imidazolinyl, morpholino, piperadinyl, piperazinyl, pyridazinyl, pyrazolidinyl, pyrazolinyl, pyrrolidinyl, pyrrolinyl, thiomorpholino or 1,1-dioxo-thiomorpholin-4-yl. Representative heterocycles that may be formed from R₃ and R₄ include, but are not limited to, optionally substituted azepane, azocane, dihydroisoquinoline, imidazole, morpholine, octahydroquinoline, piperazine, piperidine and pyrrolidine. Representative heterocycles that may be formed from R₃ or R₄, in combination with an R₅ or R₆, include (but are not limited to) optionally substituted piperadine and pyrrolidine

R₅ and R₆ of Formula III, within certain embodiments, are independently (at each occurrence) hydrogen or optionally substituted C₁-C₆alkyl; in addition, or alternatively, any R₅ or R₆ may be joined with any other R₅ or R₆ to form an optionally substituted 5- to 7-membered cycloalkyl, or (as discussed above) joined with R₃ or R₄ to form an optionally substituted heterocycle.

Within Formula IV, R₃ may be (in certain embodiments) (i) hydrogen or (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₃-C₈alkanone, C₂-C₈alkyl ether, C₆-C₁₀arylC₀-C₈alkyl, or 5- to 10-membered heterocycleC₀-C₈alkyl, each of which is optionally substituted with from 1 to 9 substituents independently selected from R_(b). Within other embodiments, R₃ of Formula IV is (i) hydrogen or (ii) C₁-C₆alkyl, C₂-C₆alkyl ether, phenylC₀-C₄alkyl, 5- to 6-membered heteroarylC₀-C₄alkyl, or 4- to 7-membered heterocycloalkylC₀-C₄alkyl, each of which is optionally substituted with from 1 to 4 substituents independently selected from hydroxy, halogen, amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy. Representative R₃ groups include hydrogen, C₁-C₄alkyl, C₁-C₄alkyl ether and benzyl, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from hydroxy, halogen and C₁-C₄alkyl. Alternatively, R₃ may be joined to an R₅ or R₆ group (along with the 0 to which R₃ is bound and any carbon atoms between the O and R₅ or R₆) to form an optionally substituted heterocycle, such as a 5- to 10-membered mono- or bi-cyclic group. The resulting heterocycle may, for example, be substituted with from 0 to 4 (e.g., 0, 1 or 2) substituents independently chosen from hydroxy, halogen, C₁-C₄alkyl, haloC₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkoxy, C₁-C₄alkanoyl, C₁-C₄alkoxycarbonyl, aminocarbonyl, heterocycleC₀-C₈alkyl and heterocycleC₁-C₈alkoxycarbonyl.

R₅ and R₆, within certain embodiments of Formula IV, are independently (at each occurrence) hydrogen or optionally substituted C₁-C₆alkyl; in addition, or alternatively, any R₅ or R₆ may be joined with any other R₅ or R₆ to form an optionally substituted 5- to 7-membered cycloalkyl, or (as discussed above) joined with R₃ to form an optionally substituted heterocycle. In certain such embodiments, each R₅ and R₆ is hydrogen. n may be 1, 2 or 3, with 1 preferred in certain embodiments.

Certain preferred compounds satisfy at least one of Formulas Ia, Ia, IIIa or IVa, in which the variables are as defined above for Formulas I, II, III and IV, respectively:

Representative compounds of Formulas I-IV include, but are not limited to, those specifically described in Examples 1-3. It will be apparent that the specific compounds recited therein are representative only, and are not intended to limit the scope of the present invention. Further, as noted above, all compounds of the present invention may be present as a hydrate, free base or a pharmaceutically acceptable acid addition salt.

Substituted quinazolin-4-ylamine analogues provided herein detectably alter (modulate) vanilloid ligand-induced VR1 activity, as determined using a standard in vitro VR1 ligand binding assay and/or a functional assay such as a calcium mobilization assay, dorsal root ganglion assay or in vivo pain relief assay. References herein to a “VR1 ligand binding assay” are intended to refer to a standard in vitro receptor binding assay such as that provided in Example 5, and a “calcium mobilization assay” (also referred to herein as a “signal transduction assay” may be performed using the method of Example 6. Briefly, to assess VR1 binding, a competition assay may be performed in which a VR1 preparation is incubated with labeled (e.g., ¹²⁵I) VR1 agonist and unlabeled test compound. Within the assays provided herein, the VR1 used is preferably a mammalian VR1, more preferably a human or rat VR1. The receptor may be recombinantly expressed or naturally expressed. The VR1 preparation may be, for example, a membrane preparation from HEK293 or CHO cells that recombinantly express human VR1 (such as a VR1 sequence provided in U.S. Pat. No. 6,482,611).

Incubation with a compound that detectably modulates vanilloid ligand binding to VR1 will result in a decrease or increase in the amount of label bound to the VR1 preparation, relative to the amount of label bound in the absence of the compound. Preferably, such a compound will exhibit a K_(i) at VR1 of less than 1 micromolar, more preferably less than 500 nM, 100 nM, 20 nM, 10 nM or 1 nM within a VR1 ligand binding assay performed as described in Example 5. In general, compounds that decrease the amount of label bound to the VR1 preparation within such an assay are preferred.

As noted above, compounds that are VR1 antagonists are preferred within certain embodiments. Such compounds exhibit IC₅₀ values of 1 micromolar or less, preferably about 100 nanomolar or less, 10 nanomolar or less or 1 nanomolar or less within a standard in vitro VR1-mediated calcium mobilization assay, as provided in Example 6. Briefly, cells expressing capsaicin receptor are contacted with a compound of interest and with an indicator of intracellular calcium concentration (e.g., a membrane permeable calcium sensitivity dye such as Fluo-3 or Fura-2 (both of which are available, for example, from Molecular Probes, Eugene, Oreg.), each of which produce a fluorescent signal when bound to Ca⁺⁺). Such contact is preferably carried out by one or more incubations of the cells in buffer or culture medium comprising either or both of the compound and the indicator in solution. Contact is maintained for an amount of time sufficient to allow the dye to enter the cells (e.g., 1-2 hours). Cells are washed or filtered to remove excess dye and are then contacted with a vanilloid receptor agonist (e.g., capsaicin, RTX or olvanil), typically at a concentration equal to the IC₅₀ concentration, and a fluorescence response is measured. When cells are contacted with a compound that is a VR1 antagonist, and with a vanilloid receptor agonist, the fluorescence response is generally reduced by at least 20%, preferably at least 50% and more preferably at least 80%, as compared to cells that are contacted with the agonist in the absence of test compound. Alternatively, or in addition, compounds may be evaluated for activity using a cultured dorsal root ganglion assay as provided in Example 9 and/or an in vivo pain relief assay as provided in Example 10. Compounds provided herein preferably have a statistically significant specific effect on VR1 activity within one or more such functional assays.

Within certain embodiments, modulators provided herein do not substantially modulate ligand binding to other cell surface receptors, such as EGF receptor tyrosine kinase or the nicotinic acetylcholine receptor. In other words, such modulators do not substantially inhibit activity of a cell surface receptor such as the human epidermal growth factor (EGF) receptor tyrosine kinase or the nicotinic acetylcholine receptor (e.g., the IC₅₀ or IC₄₀ at such a receptor is preferably greater than 1 micromolar, and most preferably greater than 10 micromolar). Preferably, a modulator does not detectably inhibit EGF receptor activity or nicotinic acetylcholine receptor activity at a concentration of 0.5 micromolar, 1 micromolar or more preferably 10 micromolar. Assays for determining EGF receptor inhibition are well known in the art, and include those described by Carpenter et al. (1979) J. Biol. Chem. 254:4884, as well as U.S. Pat. Nos. 5,654,307 and 6,169,091, and WO 95/19774. Assays for determining nicotinic acetylcholine receptor inhibition (e.g., as IC₄₀) are also well known in the art, and include those described by Liu and Simon (1997) Neuroscience Letters 228:29.

Preferred compounds of the present invention are non-sedating. In other words, a dose of such compounds that is twice the minimum dose sufficient to provide analgesia in an animal model for determining pain relief (such as a model provided in Example 10, herein) causes only transient (i.e., lasting for no more than ½ the time that pain relief lasts) or preferably no statistically significant sedation in an animal model assay of sedation (using the method described by Fitzgerald et al. (1988) Toxicology 49(2-3):433-9). Preferably, a dose that is five times the minimum dose sufficient to provide analgesia does not produce statistically significant sedation. More preferably, a compound provided herein does not produce sedation at intravenous doses of less than 25 mg/kg (preferably less than 10 mg/kg) or at oral doses of less than 140 mg/kg (preferably less than 50 mg/kg, more preferably less than 30 mg/kg).

If desired, compounds provided herein may be evaluated for certain pharmacological properties including, but not limited to, oral bioavailability (preferred compounds are orally bioavailable to an extent allowing for therapeutically effective concentrations of the compound to be achieved at oral doses of less than 140 mg/kg, preferably less than 50 mg/kg, more preferably less than 30 mg/kg, even more preferably less than 10 mg/kg, still more preferably less than 1 mg/kg and most preferably less than 0.1 mg/kg), toxicity (a preferred compound is nontoxic when a capsaicin receptor modulatory amount is administered to a subject), side effects (a preferred compound produces side effects comparable to placebo when a therapeutically effective amount of the compound is administered to a subject), serum protein binding and in vitro and in vivo half-life (a preferred compound exhibits an in vitro half-life that is equal to an in vivo half-life allowing for Q.I.D dosing, preferably T.I.D. dosing, more preferably B.I.D. dosing, and most preferably once-a-day dosing). In addition, differential penetration of the blood brain barrier may be desirable for compounds used to treat pain by modulating CNS VR1 activity such that total daily oral doses as described above provide such modulation to a therapeutically effective extent, while low brain levels of compounds used to treat peripheral nerve mediated pain may be preferred (i.e., such doses do not provide brain (e.g., CSF) levels of the compound sufficient to significantly modulate VR1 activity). Routine assays that are well known in the art may be used to assess these properties, and identify superior compounds for a particular use. For example, assays used to predict bioavailability include transport across human intestinal cell monolayers, including Caco-2 cell monolayers. Penetration of the blood brain barrier of a compound in humans may be predicted from the brain levels of the compound in laboratory animals given the compound (e.g., intravenously). Serum protein binding may be predicted from albumin binding assays. Compound half-life is inversely proportional to the frequency of dosage of a compound. In vitro half-lives of compounds may be predicted from assays of microsomal half-life as described within Example 7, herein.

Toxicity and side effects may be assessed using any standard method. In general, the term “nontoxic” as used herein shall be understood in a relative sense and is intended to refer to any substance that has been approved by the United States Food and Drug Administration (“FDA”) for administration to mammals (preferably humans) or, in keeping with established criteria, is susceptible to approval by the FDA for administration to mammals (preferably humans). Toxicity may be also evaluated using the assay detecting an effect on cellular ATP production provided in Example 8. Other assays that may be used include bacterial reverse mutation assays, such as an Ames test, as well as standard teratogenicity and tumorogenicity assays. Preferably, administration of compounds provided herein at certain doses (i.e., doses yielding therapeutically effective in vivo concentrations or preferably doses of 0.01, 0.05, 0.1, 0.5, 1, 5, 10, 40, or 50 mg/kg administered parenterally or orally) does not result in prolongation of heart QT intervals (i.e., as determined by electrocardiography in guinea pigs, minipigs or dogs). When administered daily for five or preferably ten days, such doses also do not cause liver enlargement resulting in an increase of liver to body weight ratio of more than 100%, preferably not more than 75% and more preferably not more than 50% over matched controls in laboratory rodents (e.g., mice or rats). Such doses also preferably do not cause liver enlargement resulting in an increase of liver to body weight ratio of more than 50%, preferably not more than 25%, and more preferably not more than 10% over matched untreated controls in dogs or other non-rodent mammals.

Preferred compounds also do not promote substantial release of liver enzymes (e.g., ALT, LDH, or AST) from hepatocytes in vivo. Preferably the above doses do not elevate serum levels of such enzymes by more than 100%, preferably not by more than 75% and more preferably not by more than 50% over matched untreated controls in vivo in laboratory rodents. Similarly, concentrations (in culture media or other such solutions that are contacted and incubated with cells in vitro) equivalent to two-fold, preferably five-fold, and most preferably ten-fold the minimum in vivo therapeutic concentration do not cause detectable release of any of such liver enzymes from hepatocytes in vitro into culture medium above baseline levels seen in media from untreated cells.

Preferred compounds further do not exhibit significant activity as sodium ion channel blockers, exhibiting less than 15 percent inhibition, and more preferably less than 10 percent inhibition, of sodium channel specific ligand (e.g., batrachotoxin, tetrodotoxin or saxitoxin) binding when present at a concentration of 4 μM or less. Assays for sodium channel specific ligand binding are well known in the art. In addition, preferred compounds do not exhibit significant androgen antagonist activity (e.g., in vivo, in a Hershberger assay, or in vitro, in an assay such as that described by Nellemann et al. (2001) Toxicology 163(1):29-38). Preferred compounds exhibit less than a 15% inhibition, more preferably less than a 10% inhibition, and most preferably less than 5% inhibition of androgen receptor activation in the in vitro assay when present at concentrations of 4 μM or less. By significant activity is meant results varying from control at the p<0.1 level or more preferably at the p<0.05 level of significance as measured using a standard parametric assay of statistical significance such as a student's T test.

For detection purposes, as discussed in more detail below, compounds provided herein may be isotopically-labeled or radiolabeled. Accordingly, compounds recited in Formula I may have one or more atoms replaced by an atom of the same element having an atomic mass or mass number different from the atomic mass or mass number usually found in nature. Examples of isotopes that can be present in the compounds provided herein include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine and chlorine, such as ²H, ³H, ¹¹C, ¹³C, ¹⁴C, ¹⁵N, ¹⁸O, ¹⁷O, ³¹P, ³²P, ³⁵S, ¹⁸F and ³⁶Cl. In addition, substitution with heavy isotopes such as deuterium (i.e., ²H) can afford certain therapeutic advantages resulting from greater metabolic stability, for example increased in vivo half-life or reduced dosage requirements and, hence, may be preferred in some circumstances.

Preparation Of VR1Modulators

Substituted quinazolin-4-ylamine analogues may generally be prepared using standard synthetic methods. In general, starting materials are commercially available from suppliers such as Sigma-Aldrich Corp. (St. Louis, Mo.), or may be synthesized from commercially available precursors using established protocols. By way of example, a synthetic route similar to that shown in any of Schemes 1-23 may be used, together with synthetic methods known in the art of synthetic organic chemistry, or variations thereon as appreciated by those skilled in the art. “R,” in the following schemes, refers to any group consistent with the description of the compounds provided herein.

In the Schemes that follow, the term “catalyst” refers to a suitable transition metal catalyst such as, but not limited to, tetrakis(triphenylphosphine)palladium(0) or palladium(II) acetate. In addition, the catalytic systems may include ligands such as, but not limited to, 2-(Dicyclohexylphosphino)biphenyl and tri-tert-butylphosphine, and may also include a base such as K₃PO₄, Na₂CO₃ or sodium or potassium tert-butoxide. Transition metal-catalyzed reactions can be carried out at ambient or elevated temperatures using various inert solvents including, but not limited to, toluene, dioxane, DMF, N-methylpyrrolidinone, ethyleneglycol dimethyl ether, diglyme and acetonitrile. When used in conjunction with suitable metallo-aryl reagents, transition metal-catalyzed (hetero)aryl-aryl coupling reactions can be used to prepare the compounds encompassed in general structures 1C, 2A and 2F, 3C, 5A and 5H, 14C, 15A, 16D, 18D, 19C, 20C and 22C. Commonly employed reagent/catalyst pairs include aryl boronic acid/palladium(0) (Suzuki reaction; Miyaura and Suzuki (1995) Chemical Reviews 95:2457) and aryl trialkylstannane/palladium(0) (Stille reaction; T. N. Mitchell, Synthesis (1992) 803), arylzinc/palladium(0) and aryl Grignard/nickel(II).

The term “reduce” refers to the process of reducing a nitro functionality to an amino functionality. This transformation can be carried out in a number of ways well known to those skilled in the art of organic synthesis including, but not limited to, catalytic hydrogenation, reduction with SnCl₂ and reduction with titanium trichloride. For an overview of reduction methods see: Hudlicky, M. (1996) Reductions in Organic Chemistry, ACS Monograph 188.

The term “activate” refers to a synthetic transformation in which a carbonyl of an amide moiety is converted to a suitable leaving group (L). Such a transformation can be used, for example, to prepare compounds of general structure 1F, 2E, 2G, 5F, 11A, 14I, 15G, 16L, 17H, 19I, 20I, 21C and 23H. Reagents suitable for carrying out this transformation are well known to those skilled in the art of organic synthesis and include, but are not limited to, SOCl₂, POCl₃ and triflic anhydride.

The term “oxidize” refers to a synthetic transformation wherein a methyl group is converted to a carboxylic acid functionality. Such a transformation can be used, for example, to prepare compounds such as 10E, 11-C, 14E, 19E and 22D. Various reagents familiar to those skilled in the art of organic synthesis may be used to carry out this transformation including, but not limited to, KMnO₄ in basic media (e.g., NaOH solution or aqueous pyridine) and K₂Cr₂O₇ in acidic media (e.g., H₂SO₄).

The term “cyclize” refers to a synthetic transformation in which ortho-amino-benzoic acids, ortho-amino-benzoic esters, and ortho-amino-benzonitriles are converted to the corresponding 3H-Quinazolin-4-ones. Methods for effecting the cyclization of ortho-amino-benzonitriles include, but are not limited to, reaction with refluxing formic acid containing sodium acetate. Methods for effecting the cyclization of ortho-amino-benzoic acids include, but are not limited to, reaction with formamide at elevated temperatures or reaction with formamidine acetate in an inert solvent, also at elevated temperatures. Methods for effecting the cyclization of ortho-amino-benzoic esters include, but are not limited to, reaction with formamidine acetate at elevated temperature in an inert solvent.

In Scheme 8, “H₂N-Prot” refers to a protected amino functionality, such as 4-methoxybenzylamine, and “deprotect” refers to a chemical method by which such a protecting group can be removed. For an overview of protection and deprotection methods as used by those skilled in the art of organic synthesis, see: Greene, T. and Wuts, P. Protective Groups in Organic Synthesis, 3rd ed., John Wiley and Sons, 1999.

In Scheme 9, the term “nucleophile” refers to a primary or secondary amine, or an alkoxide.

In Scheme 19, the term “deprotection” refers to the process of cleaving the C—O bond of a benzylic ether to give a “deprotected” alcohol using various methods familiar to those who are skilled in the art of organic synthesis. This is exemplified in Scheme 19 in which compounds of general structure 19I can be converted to deprotected alcohols of general structure 19J. Methods to effect this transformation include, but are not limited to, hydrogenolysis using hydrogen gas and an appropriate catalyst system such as palladium on carbon or Raney nickel. For an overview of protection and deprotection methods as used by those skilled in the art of organic synthesis, see: Greene, T. and Wuts, P. Protective Groups in Organic Synthesis, 3rd ed., John Wiley and Sons, 1999.

The term “demethylation” refers to the cleavage of the Me-O bond in a methyl ether functionality as exemplified by the conversion on 16D to 16E. This transformation can be carried out in a variety of ways familiar to those skilled in the art of organic synthesis including, but not limited to, treatment with HBr, treatment with Lewis acid/nucleophile combinations, Trimethylsilyl iodide, etc.

In certain embodiments, a VR1 modulator may contain one or more asymmetric carbon atoms, so that the compound can exist in different stereoisomeric forms. Such forms can be, for example, racemates or optically active forms. As noted above, all stereoisomers are encompassed by the present invention. Nonetheless, it may be desirable to obtain single enantiomers (i.e., optically active forms). Standard methods for preparing single enantiomers include asymmetric synthesis and resolution of the racemates. Resolution of the racemates can be accomplished, for example, by conventional methods such as crystallization in the presence of a resolving agent, or chromatography using, for example a chiral HPLC column.

As noted above, the present invention encompasses pharmaceutically acceptable salts of the compounds described herein. As used herein, a “pharmaceutically acceptable salt” is an acid or base salt that is generally considered in the art to be suitable for use in contact with the tissues of human beings or animals without excessive toxicity, irritation, allergic response, or other problem or complication. Such salts include mineral and organic acid salts of basic residues such as amines, as well as alkali or organic salts of acidic residues such as carboxylic acids. Specific pharmaceutical salts include, but are not limited to, salts of acids such as hydrochloric, phosphoric, hydrobromic, malic, glycolic, fumaric, sulfuric, sulfamic, sulfanilic, formic, toluenesulfonic, methanesulfonic, benzene sulfonic, ethane disulfonic, 2-hydroxyethylsulfonic, nitric, benzoic, 2-acetoxybenzoic, citric, tartaric, lactic, stearic, salicylic, glutamic, ascorbic, pamoic, succinic, fumaric, maleic, propionic, hydroxymaleic, hydroiodic, phenylacetic, alkanoic such as acetic, HOOC—(CH₂)_(n)—COOH where n is 0-4, and the like. Similarly, pharmaceutically acceptable cations include, but are not limited to sodium, potassium, calcium, aluminum, lithium and ammonium. Those of ordinary skill in the art will recognize further pharmaceutically acceptable salts for the compounds provided herein, including those listed by Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa., p. 1418 (1985). Accordingly, the present disclosure should be construed to include all pharmaceutically acceptable salts of the compounds specifically recited.

A wide variety of synthetic procedures are available for the preparation of pharmaceutically acceptable salts. In general, a pharmaceutically acceptable salt can be synthesized from a parent compound that contains a basic or acidic moiety by any conventional chemical method. Briefly, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two; generally, nonaqueous media like ether, ethyl acetate, ethanol, isopropanol, or acetonitrile are preferred.

Prodrugs of the compounds provided herein may be prepared by modifying functional groups present in the compounds in such a way that the modifications are cleaved to the parent compounds. Prodrugs include compounds wherein hydroxy, amine or sulfhydryl groups are bonded to any group that, when administered to a mammalian subject, cleaves to form a free hydroxyl, amino, or sulfhydryl group, respectively. Examples of prodrugs include, but are not limited to, acetate, formate and benzoate derivatives of alcohol and amine functional groups within the compounds provided herein. Preferred prodrugs include acylated derivatives. Those of ordinary skill in the art will recognize various synthetic methods that may be employed to prepare prodrugs of the compounds provided herein.

Compounds may be radiolabeled by carrying out their synthesis using precursors comprising at least one atom that is a radioisotope. Each radioisotope is preferably carbon (e.g., ¹⁴C), hydrogen (e.g., ³H), sulfur (e.g., ³⁵S), or iodine (e.g., ¹²⁵I). Tritium labeled compounds may also be prepared catalytically via platinum-catalyzed exchange in tritiated acetic acid, acid-catalyzed exchange in tritiated trifluoroacetic acid, or heterogeneous-catalyzed exchange with tritium gas using the compound as substrate. In addition, certain precursors may be subjected to tritium-halogen exchange with tritium gas, tritium gas reduction of unsaturated bonds, or reduction using sodium borotritide, as appropriate. Preparation of radiolabeled compounds may be conveniently performed by a radioisotope supplier specializing in custom synthesis of radiolabeled probe compounds.

Pharmaceutical Compositions

The present invention also provides pharmaceutical compositions comprising one or more VR1 modulators, together with at least one physiologically acceptable carrier or excipient. Pharmaceutical compositions may comprise, for example, one or more of water, buffers (e.g., neutral buffered saline or phosphate buffered saline), ethanol, mineral oil, vegetable oil, dimethylsulfoxide, carbohydrates (e.g., glucose, mannose, sucrose or dextrans), mannitol, proteins, adjuvants, polypeptides or amino acids such as glycine, antioxidants, chelating agents such as EDTA or glutathione and/or preservatives. As noted above, other active ingredients may (but need not) be included in the pharmaceutical compositions provided herein.

Pharmaceutical compositions may be formulated for any appropriate manner of administration, including, for example, topical, oral, nasal, rectal or parenteral administration. The term parenteral as used herein includes subcutaneous, intradermal, intravascular (e.g., intravenous), intramuscular, spinal, intracranial, intrathecal and intraperitoneal injection, as well as any similar injection or infusion technique. In certain embodiments, compositions in a form suitable for oral use are preferred. Such forms include, for example, tablets, troches, lozenges, aqueous or oily suspensions, dispersible powders or granules, emulsion, hard or soft capsules, or syrups or elixirs. Within yet other embodiments, compositions of the present invention may be formulated as a lyophilizate. Formulation for topical administration may be preferred for certain conditions (e.g., in the treatment of skin conditions such as burns or itch).

Compositions intended for oral use may further comprise one or more components such as sweetening agents, flavoring agents, coloring agents and/or preserving agents in order to provide appealing and palatable preparations. Tablets contain the active ingredient in admixture with physiologically acceptable excipients that are suitable for the manufacture of tablets. Such excipients include, for example, inert diluents (e.g., calcium carbonate, sodium carbonate, lactose, calcium phosphate or sodium phosphate), granulating and disintegrating agents (e.g., corn starch or alginic acid), binding agents (e.g., starch, gelatin or acacia) and lubricating agents (e.g., magnesium stearate, stearic acid or talc). The tablets may be uncoated or they may be coated by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period. For example, a time delay material such as glyceryl monosterate or glyceryl distearate may be employed.

Formulations for oral use may also be presented as hard gelatin capsules wherein the active ingredient is mixed with an inert solid diluent (e.g., calcium carbonate, calcium phosphate or kaolin), or as soft gelatin capsules wherein the active ingredient is mixed with water or an oil medium (e.g., peanut oil, liquid paraffin or olive oil).

Aqueous suspensions contain the active material(s) in admixture with excipients suitable for the manufacture of aqueous suspensions. Such excipients include suspending agents (e.g., sodium carboxymethylcellulose, methylcellulose, hydropropylmethylcellulose, sodium alginate, polyvinylpyrrolidone, gum tragacanth and gum acacia); and dispersing or wetting agents (e.g., naturally-occurring phosphatides such as lecithin, condensation products of an alkylene oxide with fatty acids such as polyoxyethylene stearate, condensation products of ethylene oxide with long chain aliphatic alcohols such as heptadecaethyleneoxycetanol, condensation products of ethylene oxide with partial esters derived from fatty acids and a hexitol such as polyoxyethylene sorbitol monooleate, or condensation products of ethylene oxide with partial esters derived from fatty acids and hexitol anhydrides such as polyethylene sorbitan monooleate). Aqueous suspensions may also comprise one or more preservatives, for example ethyl, or n-propyl p-hydroxybenzoate, one or more coloring agents, one or more flavoring agents, and one or more sweetening agents, such as sucrose or saccharin.

Oily suspensions may be formulated by suspending the active ingredients in a vegetable oil (e.g., arachis oil, olive oil, sesame oil or coconut oil) or in a mineral oil such as liquid paraffin. The oily suspensions may contain a thickening agent such as beeswax, hard paraffin or cetyl alcohol. Sweetening agents such as those set forth above, and/or flavoring agents may be added to provide palatable oral preparations. Such suspensions may be preserved by the addition of an anti-oxidant such as ascorbic acid.

Dispersible powders and granules suitable for preparation of an aqueous suspension by the addition of water provide the active ingredient in admixture with a dispersing or wetting agent, suspending agent and one or more preservatives. Suitable dispersing or wetting agents and suspending agents are exemplified by those already mentioned above. Additional excipients, such as sweetening, flavoring and coloring agents, may also be present.

Pharmaceutical compositions may also be in the form of oil-in-water emulsions. The oily phase may be a vegetable oil (e.g., olive oil or arachis oil), a mineral oil (e.g., liquid paraffin) or a mixture thereof. Suitable emulsifying agents include naturally-occurring gums (e.g., gum acacia or gum tragacanth), naturally-occurring phosphatides (e.g., soy bean, lecithin, and esters or partial esters derived from fatty acids and hexitol), anhydrides (e.g., sorbitan monoleate) and condensation products of partial esters derived from fatty acids and hexitol with ethylene oxide (e.g., polyoxyethylene sorbitan monoleate). An emulsion may also comprise one or more sweetening and/or flavoring agents.

Syrups and elixirs may be formulated with sweetening agents, such as glycerol, propylene glycol, sorbitol or sucrose. Such formulations may also comprise one or more demulcents, preservatives, flavoring agents and/or coloring agents.

Formulations for topical administration typically comprise a topical vehicle combined with active agent(s), with or without additional optional components. Suitable topical vehicles and additional components are well known in the art, and it will be apparent that the choice of a vehicle will depend on the particular physical form and mode of delivery. Topical vehicles include water; organic solvents such as alcohols (e.g., ethanol or isopropyl alcohol) or glycerin; glycols (e.g., butylene, isoprene or propylene glycol); aliphatic alcohols (e.g., lanolin); mixtures of water and organic solvents and mixtures of organic solvents such as alcohol and glycerin; lipid-based materials such as fatty acids, acylglycerols (including oils, such as mineral oil, and fats of natural or synthetic origin), phosphoglycerides, sphingolipids and waxes; protein-based materials such as collagen and gelatin; silicone-based materials (both non-volatile and volatile); and hydrocarbon-based materials such as microsponges and polymer matrices. A composition may further include one or more components adapted to improve the stability or effectiveness of the applied formulation, such as stabilizing agents, suspending agents, emulsifying agents, viscosity adjusters, gelling agents, preservatives, antioxidants, skin penetration enhancers, moisturizers and sustained release materials. Examples of such components are described in Martindale—The Extra Pharmacopoeia (Pharmaceutical Press, London 1993) and Martin (ed.), Remington's Pharmaceutical Sciences. Formulations may comprise microcapsules, such as hydroxymethylcellulose or gelatin-microcapsules, liposomes, albumin microspheres, microemulsions, nanoparticles or nanocapsules.

A topical formulation may be prepared in a variety of physical forms including, for example, solids, pastes, creams, foams, lotions, gels, powders, aqueous liquids and emulsions. The physical appearance and viscosity of such forms can be governed by the presence and amount of emulsifier(s) and viscosity adjuster(s) present in the formulation. Solids are generally firm and non-pourable and commonly are formulated as bars or sticks, or in particulate form; solids can be opaque or transparent, and optionally can contain solvents, emulsifiers, moisturizers, emollients, fragrances, dyes/colorants, preservatives and other active ingredients that increase or enhance the efficacy of the final product. Creams and lotions are often similar to one another, differing mainly in their viscosity; both lotions and creams may be opaque, translucent or clear and often contain emulsifiers, solvents, and viscosity adjusting agents, as well as moisturizers, emollients, fragrances, dyes/colorants, preservatives and other active ingredients that increase or enhance the efficacy of the final product. Gels can be prepared with a range of viscosities, from thick or high viscosity to thin or low viscosity. These formulations, like those of lotions and creams, may also contain solvents, emulsifiers, moisturizers, emollients, fragrances, dyes/colorants, preservatives and other active ingredients that increase or enhance the efficacy of the final product. Liquids are thinner than creams, lotions, or gels and often do not contain emulsifiers. Liquid topical products often contain solvents, emulsifiers, moisturizers, emollients, fragrances, dyes/colorants, preservatives and other active ingredients that increase or enhance the efficacy of the final product.

Suitable emulsifiers for use in topical formulations include, but are not limited to, ionic emulsifiers, cetearyl alcohol, non-ionic emulsifiers like polyoxyethylene oleyl ether, PEG-40 stearate, ceteareth-12, ceteareth-20, ceteareth-30, ceteareth alcohol, PEG-100 stearate and glyceryl stearate. Suitable viscosity adjusting agents include, but are not limited to, protective colloids or non-ionic gums such as hydroxyethylcellulose, xanthan gum, magnesium aluminum silicate, silica, microcrystalline wax, beeswax, paraffin, and cetyl palmitate. A gel composition may be formed by the addition of a gelling agent such as chitosan, methyl cellulose, ethyl cellulose, polyvinyl alcohol, polyquaterniums, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carbomer or ammoniated glycyrrhizinate. Suitable surfactants include, but are not limited to, nonionic, amphoteric, ionic and anionic surfactants. For example, one or more of dimethicone copolyol, polysorbate 20, polysorbate 40, polysorbate 60, polysorbate 80, lauramide DEA, cocamide DEA, and cocamide MEA, oleyl betaine, cocamidopropyl phosphatidyl PG-dimonium chloride, and ammonium laureth sulfate may be used within topical formulations. Suitable preservatives include, but are not limited to, antimicrobials such as methylparaben, propylparaben, sorbic acid, benzoic acid, and formaldehyde, as well as physical stabilizers and antioxidants such as vitamin E, sodium ascorbate/ascorbic acid and propyl gallate. Suitable moisturizers include, but are not limited to, lactic acid and other hydroxy acids and their salts, glycerin, propylene glycol, and butylene glycol. Suitable emollients include lanolin alcohol, lanolin, lanolin derivatives, cholesterol, petrolatum, isostearyl neopentanoate and mineral oils. Suitable fragrances and colors include, but are not limited to, FD&C Red No. 40 and FD&C Yellow No. 5. Other suitable additional ingredients that may be included a topical formulation include, but are not limited to, abrasives, absorbents, anti-caking agents, anti-foaming agents, anti-static agents, astringents (e.g., witch hazel, alcohol and herbal extracts such as chamomile extract), binders/excipients, buffering agents, chelating agents, film forming agents, conditioning agents, propellants, opacifying agents, pH adjusters and protectants.

An example of a suitable topical vehicle for formulation of a gel is: hydroxypropylcellulose (2.1%); 70/30 isopropyl alcohol/water (90.9%); propylene glycol (5.1%); and Polysorbate 80 (1.9%). An example of a suitable topical vehicle for formulation as a foam is: cetyl alcohol (1.1%); stearyl alcohol (0.5%; Quaternium 52 (1.0%); propylene glycol (2.0%); Ethanol 95 PGF3 (61.05%); deionized water (30.05%); P75 hydrocarbon propellant (4.30%). All percents are by weight.

Typical modes of delivery for topical compositions include application using the fingers; application using a physical applicator such as a cloth, tissue, swab, stick or brush; spraying (including mist, aerosol or foam spraying); dropper application; sprinkling; soaking; and rinsing. Controlled release vehicles can also be used.

A pharmaceutical composition may be prepared as a sterile injectible aqueous or oleaginous suspension. The modulator, depending on the vehicle and concentration used, can either be suspended or dissolved in the vehicle. Such a composition may be formulated according to the known art using suitable dispersing, wetting agents and/or suspending agents such as those mentioned above. Among the acceptable vehicles and solvents that may be employed are water, 1,3-butanediol, Ringer's solution and isotonic sodium chloride solution. In addition, sterile, fixed oils may be employed as a solvent or suspending medium. For this purpose any bland fixed oil may be employed, including synthetic mono- or diglycerides. In addition, fatty acids such as oleic acid find use in the preparation of injectible compositions, and adjuvants such as local anesthetics, preservatives and/or buffering agents can be dissolved in the vehicle.

Modulators may also be prepared in the form of suppositories (e.g., for rectal administration). Such compositions can be prepared by mixing the drug with a suitable non-irritating excipient that is solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug. Suitable excipients include, for example, cocoa butter and polyethylene glycols.

Pharmaceutical compositions may be formulated as sustained release formulations (i.e., a formulation such as a capsule that effects a slow release of modulator following administration). Such formulations may generally be prepared using well known technology and administered by, for example, oral, rectal or subcutaneous implantation, or by implantation at the desired target site. Carriers for use within such formulations are biocompatible, and may also be biodegradable; preferably the formulation provides a relatively constant level of modulator release. The amount of modulator contained within a sustained release formulation depends upon, for example, the site of implantation, the rate and expected duration of release and the nature of the condition to be treated or prevented.

In addition to or together with the above modes of administration, a modulator may be conveniently added to food or drinking water (e.g., for administration to non-human animals including companion animals (such as dogs and cats) and livestock). Animal feed and drinking water compositions may be formulated so that the animal takes in an appropriate quantity of the composition along with its diet. It may also be convenient to present the composition as a premix for addition to feed or drinking water.

Modulators are generally administered in a capsaicin receptor modulatory amount (i.e., an amount that achieves a concentration in a body fluid (e.g., blood, plasma, serum, CSF, synovial fluid, lymph, cellular interstitial fluid, tears or urine) that is sufficient to inhibit the binding of vanilloid ligand to VR1 in vitro). A dose is considered to be therapeutically effective if it results in a discernible patient benefit, such as pain relief, as described herein. Preferred systemic doses are no higher than 50 mg per kilogram of body weight per day (e.g., ranging from about 0.001 mg to about 50 mg per kilogram of body weight per day), with oral doses generally being about 5-20 fold higher than intravenous doses (e.g., ranging from 0.01 to 40 mg per kilogram of body weight per day).

The amount of active ingredient that may be combined with the carrier materials to produce a single dosage form will vary depending, for example, upon the patient being treated and the particular mode of administration. Dosage unit forms will generally contain between from about 10 μg to about 500 mg of an active ingredient. Optimal dosages may be established using routine testing, and procedures that are well known in the art.

Pharmaceutical compositions may be packaged for treating conditions responsive to VR1 modulation (e.g., treatment of exposure to vanilloid ligand, pain, itch, obesity or urinary incontinence). Packaged pharmaceutical compositions may include a container holding a therapeutically effective amount of at least one VR1 modulator as described herein and instructions (e.g., labeling) indicating that the contained composition is to be used for treating a condition responsive to VR1 modulation in the patient.

Methods of Use

VR1 modulators provided herein may be used as agonists or (preferably) antagonists of capsaicin receptors in a variety of contexts, both in vitro and in vivo. Within certain aspects, VR1 antagonists may be used to inhibit the binding of vanilloid ligand agonist (such as capsaicin and/or RTX) to capsaicin receptor in vitro or in vivo. In general, such methods comprise the step of contacting a capsaicin receptor with a sufficient amount of one or more quinazolin-4-ylamine analogues, in the presence of vanilloid ligand in aqueous solution and under conditions otherwise suitable for binding of the ligand to capsaicin receptor. The capsaicin receptor may be present in solution or suspension (e.g., in an isolated membrane or cell preparation), or in a cultured or isolated cell. Within certain embodiments, the capsaicin receptor is expressed by a neuronal cell present in a patient, and the aqueous solution is a body fluid. In general, the amount of quinazolin-4-ylamine analogue(s) contacted with the receptor should yield a concentration in the aqueous solution sufficient to inhibit vanilloid ligand binding to VR1 in vitro as measured, for example, using a binding assay as described in Example 5 and/or a calcium mobilization assay as described in Example 6. Preferably, one or more quinazolin-4-ylamine analogues are administered to an animal in an amount such that the analogue is present in at least one body fluid of the animal at a therapeutically effective concentration that is 100 nanomolar or less, preferably 50 nanomolar or less, 20 nanomolar or less, or 10 nanomolar or less. For example, such compounds may be administered at a dose that is less than 20 mg/kg body weight, preferably less than 5 mg/kg and, in some instances, less than 1 mg/kg.

Also provided herein are methods for modulating, preferably inhibiting, the signal-transducing activity of a capsaicin receptor. Such modulation may be achieved by contacting a capsaicin receptor (either in vitro or in vivo) with an effective amount of one or more VR1 modulators provided herein under conditions suitable for binding of the modulator(s) to the receptor. The receptor may be present in solution or suspension, in a cultured or isolated cell preparation or within a patient. Modulation of signal tranducing activity may be assessed by detecting an effect on calcium ion conductance (also referred to as calcium mobilization or flux). In general, an effective amount of VR1 modulator(s) is an amount sufficient to yield a concentration (in an aqueous solution that is in contact with the receptor) that is sufficient to modulate VR1 signal transducing activity in vitro within a calcium mobilization assay as described in Example 6. VR1 modulator(s) provided herein are preferably administered to a patient (e.g., a human) orally or topically, and are present within at least one body fluid of the animal while modulating VR1 signal-transducing activity. Preferred VR1 modulators for use in such methods modulate VR1 signal-transducing activity in vitro at a concentration of 1 nanomolar or less, preferably 100 picomolar or less, more preferably 20 picomolar or less, and in vivo at a concentration of 100 nanomolar or less in a body fluid such as blood.

The present invention further provides methods for treating conditions responsive to VR1 modulation. Within the context of the present invention, the term “treatment” encompasses both disease-modifying treatment and symptomatic treatment, either of which may be prophylactic (i.e., before the onset of symptoms, in order to prevent, delay or reduce the severity of symptoms) or therapeutic (i.e., after the onset of symptoms, in order to reduce the severity and/or duration of symptoms). A condition is “responsive to VR1 modulation” if it is characterized by inappropriate activity of a capsaicin receptor, regardless of the amount of vanilloid ligand present locally, and/or if modulation of capsaicin receptor activity results in alleviation of the condition or a symptom thereof. Such conditions include, for example, symptoms resulting from exposure to VR1-activating stimuli, pain, respiratory disorders such as asthma and chronic obstructive pulmonary disease, itch, urinary incontinence, cough, hiccup, and obesity, as described in more detail below. Such conditions may be diagnosed and monitored using criteria that have been established in the art. Patients may include humans, domesticated companion animals and livestock, with dosages as described above.

Treatment regimens may vary depending on the compound used and the particular condition to be treated. However, for treatment of most disorders, a frequency of administration of 4 times daily or less is preferred. In general, a dosage regimen of 2 times daily is more preferred, with once a day dosing particularly preferred. For the treatment of acute pain, a single dose that rapidly reaches effective concentrations is desirable. It will be understood, however, that the specific dose level and treatment regimen for any particular patient will depend upon a variety of factors including the activity of the specific compound employed, the age, body weight, general health, sex, diet, time of administration, route of administration, and rate of excretion, drug combination and the severity of the particular disease undergoing therapy. In general, the use of the minimum dose sufficient to provide effective therapy is preferred. Patients may generally be monitored for therapeutic effectiveness using medical or veterinary criteria suitable for the condition being treated or prevented.

Patients experiencing symptoms resulting from exposure to capsaicin receptor-activating stimuli include individuals with burns caused by heat, light, tear gas or acid and those whose mucous membranes are exposed (e.g., via ingestion, inhalation or eye contact) to capsaicin (e.g., from hot peppers or in pepper spray) or a related irritant such as acid, tear gas or air pollutants. The resulting symptoms (which may be treated using compounds provided herein) may include, for example, pain, broncho-constriction and inflammation.

Pain that may be treated using the compounds provided herein may be chronic or acute and includes, but is not limited to, peripheral nerve-mediated pain (especially neuropathic pain). Compounds provided herein may be used in the treatment of, for example, postmastectomy pain syndrome, stump pain, phantom limb pain, oral neuropathic pain, toothache (dental pain), denture pain, postherpetic neuralgia, diabetic neuropathy, reflex sympathetic dystrophy, trigeminal neuralgia, osteoarthritis, rheumatoid arthritis, fibromyalgia, Guillain-Barre syndrome, meralgia paresthetica, burning-mouth syndrome and/or bilateral peripheral neuropathy. Additional neuropathic pain conditions include causalgia (reflex sympathetic dystrophy —RSD, secondary to injury of a peripheral nerve), neuritis (including, for example, sciatic neuritis, peripheral neuritis, polyneuritis, optic neuritis, postfebrile neuritis, migrating neuritis, segmental neuritis and Gombault's neuritis), neuronitis, neuralgias (e.g., those mentioned above, cervicobrachial neuralgia, cranial neuralgia, geniculate neuralgia, glossopharyngial neuralgia, migranous neuralgia, idiopathic neuralgia, intercostals neuralgia, mammary neuralgia, mandibular joint neuralgia, Morton's neuralgia, nasociliary neuralgia, occipital neuralgia, red neuralgia, Sluder's neuralgia, splenopalatine neuralgia, supraorbital neuralgia and vidian neuralgia), surgery-related pain, musculoskeletal pain, AIDS-related neuropathy, MS-related neuropathy, and spinal cord injury-related pain. Headache, including headaches involving peripheral nerve activity, such as sinus, cluster (i.e., migranous neuralgia) and some tension and headaches and migraine, may also be treated as described herein. For example, migraine headaches may be prevented by administration of a compound provided herein as soon as a pre-migrainous aura is experienced by the patient. Further pain conditions that can be treated as described herein include “burning mouth syndrome,” labor pains, Charcot's pains, intestinal gas pains, menstrual pain, acute and chronic back pain, hemorrhoidal pain, dyspeptic pains, angina, nerve root pain, homotopic pain and heterotopic pain—including cancer associated pain (e.g., in patients with bone cancer), pain (and inflammation) associated with venom exposure (e.g., due to snake bite, spider bite, or insect sting) and trauma associated pain (e.g., post-surgical pain, pain from cuts, bruises and broken bones, and burn pain). Additional pain conditions that may be treated as described herein include pain associated with inflammatory bowel disease, irritable bowel syndrome and/or inflammatory bowel disease.

Within certain aspects, VR1 antagonists including (but not limited to) those specifically recited herein, may be used for the treatment of mechanical pain. As used herein, the term “mechanical pain” refers to pain other than headache pain that is not neuropathic or a result of exposure to heat, cold or external chemical stimuli. Mechanical pain includes physical trauma (other than thermal or chemical burns or other irritating and/or painful exposures to noxious chemicals) such as post-surgical pain and pain from cuts, bruises and broken bones; toothache, denture pain; nerve root pain; osteoarthritis; rheumatoid arthritis; fibromyalgia; meralgia paresthetica; back pain; cancer-associated pain; angina; carpel tunnel syndrome; and pain resulting from bone fracture, labor, hemorrhoids, intestinal gas, dyspepsia, and menstruation. Any VR1 antagonist that binds to VR1 with a K_(i) of less than 100 μM and/or inhibits VR1 activity with an EC₅₀ of less than or equal to 100 μM (determined as described herein) may be used. Preferably, the VR1 antagonist used is not a capsaicin analogue; particularly preferred VR1 antagonists are those provided herein.

Itching conditions that may be treated include psoriatic pruritis, itch due to hemodialysis, aguagenic pruritus, and itching associated with vulvar vestibulitis, contact dermatitis, insect bites and skin allergies. Urinary incontinence, as used herein, includes detrusor hyperflexia of spinal origin and bladder hypersensitivity, both of which may be treated as described herein. Compounds provided herein may also be used as anti-tussive agents (to prevent, relieve or suppress coughing) and for the treatment of hiccup, and to promote weight loss in an obese patient. Therapeutically effective amounts for use in such methods are generally sufficient to provide detectable relief from the condition being treated.

Within other aspects, VR1 antagonists provided herein may be used within combination therapy for the treatment of conditions involving inflammatory components. Such conditions include, for example, autoimmune disorders and pathologic autoimmune responses known to have an inflammatory component including, but not limited to, arthritis (especially rheumatoid arthritis), psoriasis, Crohn's disease, lupus erythematosus, irritable bowel syndrome, tissue graft rejection, and hyperacute rejection of transplanted organs. Other such conditions include trauma (e.g., injury to the head or spinal cord), cardio- and cerebo-vascular disease and certain infectious diseases.

Within such combination therapy, a VR1 antagonist is administered to a patient along with an anti-inflammatory agent. The VR1 antagonist and anti-inflammatory agent may be present in the same pharmaceutical composition, or may be administered separately in either order. Anti-inflammatory agents include, for example, non-steroidal anti-inflammatory drugs (NSAIDs), non-specific and cyclooxygenase-2 (COX-2) specific cyclooxygenase enzyme inhibitors, gold compounds, corticosteroids, methotrexate, tumor necrosis factor (TNF) receptor antagonists, anti-TNF alpha antibodies, anti-C5 antibodies, and interleukin-1 (IL-1) receptor antagonists. Examples of NSAIDs include, but are not limited to ibuprofen (e.g., ADVIL™, MOTRIN™), flurbiprofen (ANSAID™), naproxen or naproxen sodium (e.g., NAPROSYN, ANAPROX, ALEVE™), diclofenac (e.g., CATAFLAM™, VOLTAREN™), combinations of diclofenac sodium and misoprostol (e.g., ARTHROTEC™), sulindac (CLINORIL™), oxaprozin (DAYPRO™), diflunisal (DOLOBID™), piroxicam (FELDENE™), indomethacin (INDOCIN™), etodolac (LODINE™), fenoprofen calcium (NALFON™), ketoprofen (e.g., ORUDIS™, ORUVAIL™), sodium nabumetone (RELAFEN™), sulfasalazine (AZULFIDINE™), tolmetin sodium (TOLECTIN™), and hydroxychloroquine (PLAQUENIL™). A particular class of NSAIDs consists of compounds that inhibit cyclooxygenase (COX) enzymes, such as celecoxib (CELEBREX™) and rofecoxib (VIOXX™). NSAIDs further include salicylates such as acetylsalicylic acid or aspirin, sodium salicylate, choline and magnesium salicylates (TRILISATE™), and salsalate (DISALCID™), as well as corticosteroids such as cortisone (CORTONE™ acetate), dexamethasone (e.g., DECADRON™), methylprednisolone (MEDROL™) prednisolone (PRELONE™), prednisolone sodium phosphate (PEDIAPRED™), and prednisone (e.g., PREDNICEN-M™, DELTASONE™, STERAPRED™).

Suitable dosages for VR1 antagonist within such combination therapy are generally as described above. Dosages and methods of administration of anti-inflammatory agents can be found, for example, in the manufacturer's instructions in the Physician's Desk Reference. In certain embodiments, the combination administration of a VR1 antagonist with an anti-inflammatory agent results in a reduction of the dosage of the anti-inflammatory agent required to produce a therapeutic effect. Thus, preferably, the dosage of anti-inflammatory agent in a combination or combination treatment method of the invention is less than the maximum dose advised by the manufacturer for administration of the anti-inflammatory agent without combination administration of a VR1 antagonist. More preferably this dosage is less than ¾, even more preferably less than ½, and highly preferably, less than ¼ of the maximum dose, while most preferably the dose is less than 10% of the maximum dose advised by the manufacturer for administration of the anti-inflammatory agent(s) when administered without combination administration of a VR1 antagonist. It will be apparent that the dosage amount of VR1 antagonist component of the combination needed to achieve the desired effect may similarly be affected by the dosage amount and potency of the anti-inflammatory agent component of the combination.

In certain preferred embodiments the combination administration of a VR1 antagonist with an anti-inflammatory agent is accomplished by packaging one or more VR1 antagonists and one or more anti-inflammatory agents in the same package, either in separate containers within the package or preferably as a mixture of one or more VR1 antagonists and one or more anti-inflammatory agents. Preferred mixtures are formulated for oral administration (e.g., as pills, capsules, tablets or the like). Preferably the package comprises a label bearing indicia indicating that the one or more VR1 antagonists and one or more anti-inflammatory agents are to be taken together for the treatment of an inflammatory pain condition. A highly preferred combination is one in which the anti-inflammatory agent(s) include at least one COX-2 specific cyclooxygenase enzyme inhibitor such as valdecoxib (BEXTRA®), lumiracoxib (PREXIGE™), etoricoxib (ARCOXIA®), celecoxib (CELEBREX®) and/or rofecoxib (VIOXX®).

The methods discussed above generally employ modulators that are VR1 antagonists; however, methods are also provided herein that employ modulators that are VR1 agonists. Such modulators may be used, for example, in crowd control (as a substitute for tear gas) or personal protection (e.g., in a spray formulation) or as pharmaceutical agents for the treatment of pain, itch or urinary incontinence via capsaicin receptor desensitization. In general, compounds for use in crowd control or personal protection are formulated and used according to conventional tear gas or pepper spray technology.

Within separate aspects, the present invention provides a variety of non-pharmaceutical in vitro and in vivo uses for the compounds provided herein. For example, such compounds may be labeled and used as probes for the detection and localization of capsaicin receptor (in samples such as cell preparations or tissue sections, preparations or fractions thereof). Compounds may also be used as positive controls in assays for receptor activity, as standards for determining the ability of a candidate agent to bind to capsaicin receptor, or as radiotracers for positron emission tomography (PET) imaging or for single photon emission computerized tomography (SPECT). Such methods can be used to characterize capsaicin receptors in living subjects. For example, a VR1 modulator may be labeled using any of a variety of well known techniques (e.g., radiolabeled with a radionuclide such as tritium, as described herein), and incubated with a sample for a suitable incubation time (e.g., determined by first assaying a time course of binding). Following incubation, unbound compound is removed (e.g., by washing), and bound compound detected using any method suitable for the label employed (e.g., autoradiography or scintillation counting for radiolabeled compounds; spectroscopic methods may be used to detect luminescent groups and fluorescent groups). As a control, a matched sample containing labeled compound and a greater (e.g., 10-fold greater) amount of unlabeled compound may be processed in the same manner. A greater amount of detectable label remaining in the test sample than in the control indicates the presence of capsaicin receptor in the sample. Detection assays, including receptor autoradiography (receptor mapping) of capsaicin receptor in cultured cells or tissue samples may be performed as described by Kuhar in sections 8.1.1 to 8.1.9 of Current Protocols in Pharmacology (1998) John Wiley & Sons, New York.

Modulators provided herein may also be used within a variety of well known cell separation methods. For example, modulators may be linked to the interior surface of a tissue culture plate or other support, for use as affinity ligands for immobilizing and thereby isolating, capsaicin receptors (e.g., isolating receptor-expressing cells) in vitro. Within one preferred embodiment, a modulator linked to a fluorescent marker, such as fluorescein, is contacted with the cells, which are then analyzed (or isolated) by fluorescence activated cell sorting (FACS).

The following Examples are offered by way of illustration and not by way of limitation. Unless otherwise specified all reagents and solvent are of standard commercial grade and are used without further purification.

EXAMPLES Example 1 Preparation of Representative Compounds

This Example illustrates the preparation of representative substituted quinazolin-4-ylamine analogues. Mass spectroscopy data shown in this and subsequent Examples is Electrospray MS, obtained in positive ion mode with a 15V cone voltage, using a Micromass Time-of-Flight LCT, equipped with a Waters 600 pump, Waters 996 photodiode array detector, Gilson 215 autosampler, and a Gilson 841 microinjector. MassLynx (Advanced Chemistry Development, Inc; Toronto, Canada) version 3.5 software was used for data collection and analysis. Sample volume of 1 microliter was injected onto a 50×4.6 mm Chromolith SpeedROD C18 column, and eluted using a 2-phase linear gradient at 6 ml/min flow rate. Sample was detected using total absorbance count over the 220-340 nm UV range. The elution conditions were: Mobile Phase A-95/5/0.1 Water/Methanol/TFA; Mobile Phase B-5/95/0.05 Water/Methanol/TFA. Time(min) % B Gradient- 0 10 0.5 100 1.2 100 1.21 10

-   -   The total run time was 2 minutes inject to inject.

A. (4-Trifluoromethyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-quinazolin-4-yl]-amine (Cmpd 1) 1. 3-Nitro-2′-trifluoromethyl-biphenyl-4-carboxylic acid methyl ester

To a solution of 2-(trifluoromethyl)-phenylboronic acid (4.4 g, 0.0232 mol), 2-(dicyclohexylphosphino)biphenyl (111 mg, 0.318 mmol), and potassium phosphate (6.52 g, 0.031 mmol) in toluene, add palladium (II) acetate (36 mg, 0.160 mmol). Purge the reaction mixture for 10 minutes with dry nitrogen and then add 4-chloro-2-nitrobenzoic acid methyl ester. Heat the stirring reaction mixture overnight at 80° C., cool the mixture and filter through celite using ethyl acetate. Concentrate under reduced pressure, take up in fresh ethyl acetate and wash the solution with NaHCO₃ (saturated aqueous). Dry the solution (Na₂SO₄), concentrate under reduced pressure and then filter through a pad of silica gel using ethyl acetate as eluent. Removal of solvent under reduced pressure gives pure 3-nitro-2′-trifluoromethyl-biphenyl-4-carboxylic acid methyl ester as an oil.

2. 3-amino-2′-trifluoromethyl-biphenyl-4-carboxylic acid methyl ester

In a Parr apparatus, hydrogenate an ethanolic solution of 3-nitro-2′-trifluoromethyl-biphenyl-4-carboxylic acid methyl ester (5.54 g, 0.0169 mol) under 55 psi of hydrogen using tetrakis(triphenylphosphine)palladium (0) (300 mg). After 18 hours, filter the mixture through celite and concentrate under reduced pressure to give 3-amino-2′-trifluoromethyl-biphenyl-4-carboxylic acid methyl ester as a solid.

3. 7-(2-Trifluoromethyl-phenyl)-3H-quinazolin-4-one

Heat a solution of 3-amino-2′-trifluoromethyl-biphenyl-4-carboxylic acid methyl ester (5.0 g, 0.0169 mol) and formamidine acetate (2.8 g, 0.0203 mol) in 2-methoxyethanol at reflux for 8 hours. Cool the mixture and concentrate under reduced pressure to give a dark oil. Dissolve the residue in 10% NaOH and wash the aqueous with ether (3×). Bring the aqueous layer to pH ˜4 using 12N HCl to produce a milky solution. Extract the solution with EtOAc, wash the EtOAc with brine, dry (Na₂SO₄) and concentrate under reduced pressure to give 7-(2-Trifluoromethyl-phenyl)-3H-quinazolin-4-one as a beige solid.

4. 4-chloro-7-(2-trifluoromethyl-phenyl)-quinazoline

Reflux a solution of 7-(2-Trifluoromethyl-phenyl)-3H-quinazolin-4-one (1.12 g, 0.0039 mol) in POCl₃ for 16 hours. Cool the mixture and concentrate under reduced pressure. Partition the residue between saturated aqueous NaHCO₃ and EtOAc. Wash the EtOAc layer once with additional NaHCO₃, dry it (Na₂SO₄), and concentrate under reduced pressure to obtain the crude product as a solid. Filter the residue through a 2 inch pad of silica gel (50% EtOAc/Hexanes) and concentrate under reduce pressure to give 4-chloro-7-(2-trifluoromethyl-phenyl)-quinazoline as a pale yellow-brown solid.

5. (4-Trifluoromethyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-quinazolin-4-yl]-amine

Reflux a solution of 4-chloro-7-(2-trifluoromethyl-phenyl)-quinazoline (258 mg, 0.836 mmol) and 4-(trifluoromethyl)-aniline (269 mg, 1.67 mmol) in isopropyl alcohol for 8 hours. Cool the solution, collect the precipitate via filtration and wash with dry ether (3×) to give pure (4-Trifluoromethyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-quinazolin-4-yl]-amine as the mono-HCl salt. Mass spec. 433.1.

B. (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-quinolin-4-yl]-amine (Cmpd 2) 1. 7-(2-Trifluoromethyl-phenyl)-quinolin-4-ol

Combine 7-chloroquinolin-4-ol (1000 mg, 5.55 mmol) 2-(trifluoromethyl)phenylboronic acid (1583 mg, 8.33 mmol) and toluene (50 mL), and bubble nitrogen into the solution for 10 minutes. Add palladium acetate (25 mg, 0.11 mmol), 2-(dicyclohexylphosphino)biphenyl (78 mg, 0.22 mmol), and K₃PO₄ (2353 mg, 11.1 mmol) and heat at 90° C. for 16 hours. Let cool, add water (25 mL) and EtOAc (50 mL), and remove any insoluble material by filtration. Separate the EtOAc layer, and extract the aqueous layer twice with EtOAc (25 mL each). Combine the EtOAc extracts, dry (Na₂SO₄), and evaporate. Purify by silica gel chromatography (94% CH₂Cl₂/5% MeOH/1% NH₄OH) to provide 110 mg of 7-(2-Trifluoromethyl-phenyl)-quinolin-4-ol as a white solid.

2. 4-Chloro-7-(2-trifluoromethyl-phenyl)-quinoline

Heat a mixture of 7-(2-trifluoromethyl-phenyl)-quinolin-4-ol (50 mg, 0.17 mmol) in POCl₃ (10 mL) at 90° C. for 16 hours. Evaporate the POCl₃, and add ice (100 g) followed by careful addition of saturated NaHCO₃. Extract with EtOAc, dry (Na₂SO₄), and evaporate to provide 4-chloro-7-(2-trifluoromethyl-phenyl)-quinoline as a tan solid.

3. (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-quinolin-4-yl]-amine

Heat a mixture of 4-chloro-7-(2-trifluoromethyl-phenyl)-quinoline (42 mg, 0.14 mmol) and 4-(tert-butyl)aniline (41 mg, 0.29 mmol) in 2-propanol (10 mL) at reflux for 3 hours. Evaporate the mixture, add 1M NaOH (10 mL), extract twice with EtOAc (10 mL each), dry (Na₂SO₄), and evaporate to provide the crude product. Purify by silica gel chromatography, eluting with 75% hexane-EtOAc to provide (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-quinolin-4-yl]-amine as a white solid. Mass spec. 420.2.

C. (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-pyrido[3,2-d]pyrimidin-4-yl]-amine (cmpd 3) 1. 5-bromo-3-nitropyridine-2-carbonitrile

Heat a solution of 2,5-dibromo-3-nitropyridine (1.77 g, 6.3 mmol; Malinowski (1988) Bull. Soc. Chim. Belg. 97:51; see also U.S. Pat. No. 5,801,183) and cuprous cyanide (0.60 g, 6.69 mmol) in N,N-dimethylacetamide (25 mL) at 100° C. for 72 hours. After cooling, dilute the mixture with water (25 mL) and extract twice with EtOAc (25 mL each), then wash twice with water (25 mL each). The combined EtOAc extracts are dried (Na₂SO₄), evaporated, and purified by flash chromatography (50% EtOAc-hexane) to obtain 5-bromo-3-nitropyridine-2-carbonitrile as a pale solid.

2. 3-Amino-5-bromopyridine-2-carbonitrile

Mix 5-bromo-3-nitropyridine-2-carbonitrile (1.5 g, 5.3 mmol) and SnCl₂-dihydrate (5.00 g, 26.3 mmol) in concentrated HCl and allow to stir at room temperature overnight. Work up by adding ice and carefully adding 10 M NaOH until basic. Extract twice with Et₂O (200 mL), dry (Na₂SO₄) and evaporate. Purify by silica gel chromatography (75% hexane-EtOAc) to furnish 3-amino-5-bromopyridine-2-carbonitrile as a pale solid.

3. 7-Bromopyrido[3,2-d]pyrimidin-4-ol

Reflux a mixture of 3-amino-5-bromopyridine-2-carbonitrile (504 mg, 2.00 mmol) and sodium acetate (312 mg, 3.81 mmol) in formic acid (20 mL) for 16 hours. Work up by evaporating to a white solid, and add 3N NaOH (50 mL). Filter off any undissolved material, then re-form the free pyrimidinol by adding concentrated HCl until a pH of 3 is achieved. Collect 7-Bromopyrido[3,2-d]pyrimidin-4-ol and let dry overnight.

4. Bromo-4-chloropyrido[3-2-d]pyrimidine

Heat a mixture of 7-Bromopyrido[3,2-d]pyrimidin-4-ol (35 mg, 0.15 mm0l) and POCL₃ (10 mL) at 90° C. for 16 hours. Evaporate the POCl₃, and add ice (100 g) followed by careful addition of saturated NaHCO₃. Extract twice with EtOAc, dry (Na₂SO₄), and evaporate to provide bromo-4-chloropyrido[3-2-d]pyrimidine as a white solid.

5. (7-Bromo-pyrido[3,2-d]pyrimidin-4-yl)-4-tert-butyl-phenyl)-amine

Heat a mixture of bromo-4-chloropyrido[3-2-d]pyrimidine (35 mg, 0.14 mmol) and 4-(tert-butyl)aniline (43 mg, 0.29 mmol) in 2-propanol (10 mL) at reflux for 3 hours. Evaporate the mixture, add 1M NaOH (10 mL), extract twice with EtOAc (10 mL each), dry (Na2SO4), and evaporate to provide the crude product. Purify by silica gel chromatography, eluting with 75% hexane-EtOAc to provide (7-bromo-pyrido[3,2-d]pyrimidin-4-yl)-4-tert-butyl-phenyl)-amine as a white solid.

6. (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-pyrido[3,2-d]pyrimidin-4-yl]-amine

Combine (7-bromo-pyrido[3,2-d]pyrimidin-4-yl)-4-tert-butyl-phenyl)-amine (36 mg, 0.1 mmol), 2-(trifluoromethyl)phenyl-boronic acid (29 mg, 0.15 mmol) in 1,2-dimethoxyethane (10 mL) and bubble nitrogen into the mixture for 10 minutes. Add tetrakis(triphenylphosphine)palladium(0) (12 mg, 0.01 mmol) and 2M Na₂CO₃ (1 mL) and heat at 80° C. for 48 hours. Let the mixture cool to room temperature, dilute with water (10 mL), and extract twice with EtOAc (10 mL each). Dry (Na₂SO₄), evaporate, and purify on a preparative silica gel plate (2000 micron) eluting with 75% hexane-EtOAc to provide (4-tert-butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-pyrido[3,2-d]pyrimidin-4-yl]-amine as a light yellow solid. Mass spec. 422.2.

D. (4-tert-Butyl-phenyl)-[6-(2-trifluoromethyl-phenyl)-phthalazin-1-yl]-amine (cmpd 4) 1. 4-Bromo-2-dibromomethyl-benzonitrile

Reflux a mixture of 4-Bromo-2-methyl-benzonitrile (19.6 g, 0.1 mol) and bromine (39.0 g, 0.22 mol) in carbon tetrachloride (500 mL) using a 500 watt sunlamp for 16 hours. Let cool to room temperature, and filter off succinimide. Evaporate the product fully to provide 4-bromo-2-dibromomethyl-benzonitrile as a yellow powder.

2. 5-Bromo-3-hydroxy-2,3-dihydro-isoindol-1-one

Combine 4-bromo-2-dibromomethyl-benzonitrile (7.0 g, 19.8 mmol) and acetonitrile (150 mL). Drip in a mixture of silver nitrate (7.0 g, 41.2 mmol) in water (40 mL) and reflux the resulting translucent yellow liquid for 72 hours. Evaporate the mixture, and add 1M NaOH (100 mL). Extract twice with EtOAc (100 mL each). Dry the solution (Na₂SO₄), evaporate, and purify by silica gel chromatography (80% hexanes-EtOAc) to obtain 600 mg of 4-bromo-2-formyl-benzonitrile and 1250 mg of 5-bromo-3-hydroxy-2,3-dihydro-isoindol-1-one as a white solid.

3. 6-Bromo-phthalazin-1-ol

Combine 5-bromo-3-hydroxy-2,3-dihydro-isoindol-1-one (1.0 g, 4.39 mmol) and hydrazine hydrate (10 mL) and allow the suspension to stir at room temperature for 16 hours. Collect 6-Bromo-phthalazin-1-ol as a white solid.

4. 6-Bromo-1-chloro-phthalazine

Heat a mixture of 6-Bromo-phthalazin-1-ol (300 mg, 1.33 mmol) in POCl₃ (10 mL) at 90° C. for 2 hours. Evaporate the POCl₃, and add ice (100 g) followed by careful addition of saturated NaHCO₃. Extract with EtOAc, dry (Na₂SO₄), and evaporate to provide 4-chloro-7-(2-trifluoromethyl-phenyl)-quinoline as a white solid.

5. (6-Bromo-phthalazin-1-yl)-(4-tert-butyl-phenyl)-amine

Heat a mixture of 6-bromo-1-chloro-phthalazine (500 mg, 2.05 mmol) and 4-(tert-butyl)aniline (611 mg, 4.10 mmol) in 2-propanol (10 mL) at reflux for 3 hours. Evaporate the mixture, add 1M NaOH (10 mL), extract twice with EtOAc (10 mL each), dry (Na₂SO₄), and evaporate to provide the crude product. Purify by silica gel chromatography, eluting with dichloromethane followed by 95% CH₂Cl₂-MeOH to provide (6-Bromo-phthalazin-1-yl)-(4-tert-butyl-phenyl)-amine as a white solid.

6. (4-tert-Butyl-phenyl)-[6-(2-trifluoromethyl-phenyl)-phthalazin-1-yl]-amine

Combine (6-bromo-phthalazin-1-yl)-(4-tert-butyl-phenyl)-amine (60 mg, 0.19 mmol), 2-(trifluoromethyl)phenyl-boronic acid (50 mg, 0.26 mmol) in 1,2-dimethoxyethane (10 mL) and bubble nitrogen into the mixture for 10 minutes. Add tetrakis(triphenylphosphine)palladium(0) (12 mg, 0.01 mmol) and 2M Na₂CO₃ (1 mL) and heat at 80 C for 48 hours. Let the mixture cool to room temperature, dilute with water (10 mL), and extract twice with EtOAc (10 mL each). Dry (Na₂SO₄), evaporate, and purify on a preparative silica gel plate (2000 micron) eluting with 75% hexane-EtOAc to provide (4-tert-butyl-phenyl)-[6-(2-trifluoromethyl-phenyl)-phthalazin-1-yl]-amine as a straw colored solid. Mass Spec. 421.2.

E. (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidin-4-yl]-amine (cmpds 5 and 6) 1. Oxo-3-phenyl-propionaldehyde

Heat a mixture of toluene and sodium ethoxide (40 mL of a 21% ethanolic solution) to 50° C. Add 2-trifluoromethylacetophenone (20.0 g, 0.11 mol) and ethyl formate (11.8 g, 0.16 mol), and let stir at 65° C. for 12 hours. Allow mixture to cool to room temperature and add 300 mL of diethyl ether. Collect the precipitate to obtain the sodium salt of 3-oxo-3-phenyl-propionaldehyde.

2. 7-(2-Trifluoromethyl-phenyl)-1H-pyrido[2,3-d]pyrimidine-2,4-dione

Finely divide the sodium salt of 3-oxo-3-phenyl-propionaldehyde (10.0 g, 0.043 mol) and add 50 mL of 90% phosphoric acid. Let stir until fully dissolved. Separately, similarly dissolve 6-amino-1H-pyrimidine-2,4-dione 5.7 g, 0.043 mol) in 50 mL of 90% phosphoric acid. Combine the 2 solutions and let stir for 12 hours at 100° C. Let the solution cool to room temperature, add 300 mL of water, and collect the product as a sticky solid. Triturate with ether to obtain 7-(2-trifluoromethyl-phenyl)-1H-pyrido[2,3-d]pyrimidine-2,4-dione as a white solid.

3. 2,4-Dichloro-7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidine

Heat a mixture of 7-(2-Trifluoromethyl-phenyl)-1H-pyrido[2,3-d]pyrimidine-2,4-dione (5.0 g, 0.016 mol) and POCl₃ (100 mL) at 90° C. for 36 hours. Evaporate the POCl₃, and add ice (400 g) followed by careful addition of saturated NaHCO₃. Extract twice with EtOAc, dry (Na₂SO₄), and evaporate to provide 2,4-Dichloro-7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidine.

4. (4-tert-Butyl-phenyl)-[2-chloro-7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidin-4-yl]-amine (cmpd 5)

To a mixture of diisopropylethylamine (260 mg, 2.0 mmol) in acetonitrile (5 mL), add t-butylaniline (124 mg, 1.0 mmol) followed by (4-tert-Butyl-phenyl)-[2-chloro-7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidin-4-yl]-amine (310 mg, 1.0 mmol). Heat the mixture to 80° C. for six hours. Evaporate the solvent, and partition between 1M NaOH and EtOAc. Dry the solvent (Na₂SO₄) and evaporate. Purify by silica gel chromatography (1:1 hexanes/EtOAc to furnish the monoaniline (4-tert-Butyl-phenyl)-[2-chloro-7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidin-4-yl]-amine as a yellow solid.

5. (4-tert-Butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidin-4-yl]-amine (cmpd 6)

The 2-chloro substituent in (4-tert-Butyl-phenyl)-[2-chloro-7-(2-trifluoromethyl-phenyl)-pyrido[2,3-d]pyrimidin-4-yl]-amine can be removed using a number of reducing conditions known to those skilled in the art of organic synthesis e.g. hydrogenolysis or treatment with aluminum hydride reducing agents (See, e.g., Hudlicky, M. Reductions in Organic Chemistry, ACS Monograph 188: 1996).

F. [7-(3-fluoro-pyridin-2-yl)-quinazolin-4-yl]-(5-trifluoromethyl-pyridin-2-yl)-amine (cmpd 7) 1. 7-bromo-4-chloro-quinazoline

Reflux a solution of 7-bromo-3H-quinazolin-4-one (1.24 g, 0.0055 mol) in POCl₃ for 3.5 h. Remove the excess POCl₃ under reduced pressure and partition the residue between EtOAc and saturated aqueous NaHCO₃. Dry the EtOAc layer and remove the solvent under reduced pressure to give 7-bromo-4-chloro-quinazoline as a yellow solid.

2. (7-bromo-quinazolin-4-yl)-(5-trifluoromethyl-pyridin-2-yl)-amine

Heat a mixture of 7-bromo-4-chloro-quinazoline (200 mg, 0.821 mmol) and 2-amino-5-trifluoromethyl-pyridine (239 mg, 1.48 mmol) at 230° C. for 2 minutes. Cool and partition the solid residue between EtOAc and 10% NaOH. Dry the EtOAc layer (Na₂SO₄), remove the solvent under reduced pressure, and purify via flash chromatography to yield (7-bromo-quinazolin-4-yl)-(5-trifluoromethyl-pyridin-2-yl)-amine as a yellow solid.

3. 3-fluoro-2-tributylstannanyl-pyridine

Cool a solution of 2-bromo-3-fluoro-pyridine (542 mg, 3.08 mmol) in dry THF to −78° C. using a dry ice acetone bath. Add n-butyl-lithium (1.6 M in THF, 2.0 mL) to the reaction mixture dropwise via syringe over a 20 minute period. After stirring for 1.5 hours at −78° C., add tributyltin chloride slowly via syringe and remove the cooling bath. After 2 hours, partition the reaction mixture between EtOAc and brine, dry the EtOAc layer (Na₂SO₄) and remove the solvents under reduced pressure. Flash chromatography (ether/hexanes) yields 3-fluoro-2-tributylstannanyl-pyridine as a colorless oil.

4. [7-(3-fluoro-pyridin-2-yl)-quinazolin-4-yl]-(5-trifluoromethyl-pyridin-2-yl)-amine

Using procedures analogous to those given above, [7-(3-fluoro-pyridin-2-yl)-quinazolin-4-yl]-(5-trifluoromethyl-pyridin-2-yl)-amine is prepared by coupling (7-bromo-quinazolin-4-yl)-(5-trifluoromethyl-pyridin-2-yl)-amine to 3-fluoro-2-tributylstannanyl-pyridine. Mass spec. 385.1.

G. (4-tert-butyl-phenyl)-(7-pyridin-2-yl-quinazolin-4-yl)-amine (cmpd 8) 1. 4-bromo-2-nitro-benzonitrile

Stir the mixture of 1,4-dibromo-2-nitro-benzene (3.56 mmol) and CuCN (3.74 mmol) in DMA (4 ml) at 100° C. for 5 hours. Cool to room temperature, dilute with EtOAc, filter through celite, wash the organic layer with brine, dry over Na₂SO₄, and concentrate under vacuum. Purify the residue by flash chromatography (4:1 hexanes/EtOAc) to give 4-bromo-2-nitro-benzonitrile.

2. 2-amino-4-bromo-benzonitrile

To a suspension of 4-bromo-2-nitro-benzonitrile (2.60 g, 0.0115 mol) in 12N HCl at 0° C., add SnCl₂-2H₂O portionwise. As the reaction is stirred vigorously, a white precipitate will form. After 1 h add ice to the reaction vessel followed by ION NaOH until the solution is basic. Extract the aqueous mixture with ether (2×) and EtOAc (1×) and wash the combined organic layers with brine. Dry the solution (Na₂SO₄) and remove the solvents under reduced pressure to give 2-amino-4-bromo-benzonitrile as a beige solid.

3. 7-bromo-3H-quinazolin-4-one

To a solution of 2-amino-4-bromo-benzonitrile (550 mg, 2.79 mmol) in formic acid, add sodium acetate (435 mg, 5.30 mmol) in one portion. Reflux the reaction mixture for 16 h then remove the formic acid under reduced pressure to give a solid. Add 20% aqueous NaOH and stir for 1 hour. Remove the undissolved solids via filtration and acidify the filtrate with 12N HCl to produce a white solid. Collect the solid via filtration and wash it with water (5×) and ether (1×) to give 7-bromo-3H-quinazolin-4-one as an off-white solid.

4. 7-pyridin-2-yl-3H-quinazolin-4-one

To a solution of 7-bromo-3H-quinazolin-4-one (100 mg, 0.444 mmol) in toluene/dioxane (3:1), add 2-tributylstannanyl-pyridine (162 mg, 0.444 mmol) followed by tetrakis-(triphenylphosphine)-palladium(0) (26 mg, 0.022 mmol). Bubble dry nitrogen through the solution for 10 minutes then heat the stirring solution to 115° C. under a nitrogen atmosphere. After several minutes the reaction mixture becomes homogeneous. After 16 hours, cool the reaction vessel and collect the precipitate via filtration. Wash the solid with 25% EtOAc/hexanes followed by hexanes to give 7-pyridin-2-yl-3H-quinazolin-4-one as a beige solid.

5. (4-tert-butyl-phenyl)-(7-pyridin-2-yl-quinazolin-4-yl)-amine

Using procedures analogous to those given above, (4-tert-butyl-phenyl)-(7-pyridin-2-yl-quinazolin-4-yl)-amine is prepared from 4-chloro-7-pyridin-2-yl-quinazoline and 4-tert-butylaniline. Mass spec. 354.2.

H. (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride (cmpd 9) 1. 2-(4-bromo phenyl)-3-(trifluoromethyl)-pyridine

To a de-gassed mixture of 2-bromo-3-(trifluoromethyl)-pyridine (2.26 mmol), 4-bromo-phenylbronic acid (2.49 mmol), and 2M Na₂CO₃ (5.65 mmol), in DME (10 mL) under nitrogen add Pd(PPh₃)₄ (0.09 mmol). Stir the mixture at 80° C. for overnight, concentrate, extract with EtOAc. Dry over Na₂SO₄, concentrate under vacuum, and purify by flash chromatography (4:1 hexanes/EtOAc) to give 2-(4-bromo phenyl)-3-(trifluoromethyl)-pyridine.

2. 2-(4-bromo-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine

To a solution of 2-(4-bromophenyl)-3-(trifluoromethyl)-pyridine (0.93 mmol) in H₂SO₄ (4 mL) cautiously add fuming HNO₃ (2 ml). Stir the mixture 30 minutes at room temperature. Pour the mixture onto ice-water (20 mL) and collect the precipitate. Dissolve the precipitate in EtOAc and neutralize with saturated NaHCO₃, dry over Na₂SO₄, concentrate under vacuum to obtain 2-(4-bromo-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine.

3. 2-nitro-4(3-trifluoromethyl-pyridin-2-yl)-benzonitrile

To a solution of 2-(4-bromo-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine (0.55 mmol) in DMA (4 mL) add CuCN (0.60 mmol). Stir the mixture 4 hours at 110° C. Cool to room temperature, dilute with 20 ml of EtOAc, and filter through celite pad. Wash the filtrated with brine, dry over Na₂SO₄, concentrate under vacuum, and purify by flash chromatography (1:1 hexanes/EtOAc) to give 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzonitrile.

4. 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzo-nitrile

To an ice-water cooled solution of 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzonitrile (0.44 mmol) in conc. HCl (6 mL) add SnCl₂ (1.457 mmol). Stir the mixture 2 h at room temperature. neutralize with NaOH, extract with EtOAc, dry over Na₂SO₄, and concentrate under vacuum. Purify the residue by flash chromatography (4:1 hexanes/EtOAc) to give 2-amino-4(3-trifluoromethyl-pyridin-2-yl)-benzo-nitrile.

5. 7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol

Reflux 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzo-nitrile (0.41 mmol) and NaOAc (1.23 mmol) for 16 h in HCOOH (10 mL). Evaporate the solvent in vacuo, suspend the residue in 20 ml of 20% NaOH, stir for 30 min at room temperature. Filter, extract with EtOAc, dry over Na₂SO₄, and concentrate under vacuum to give 7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

6. 4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline

Reflux 7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol (0.38 mmol) for 18 hours in POCl₃ (5 mL). Evaporate the solvent in vacuo, then carefully neutralize with saturated NaHCO₃, and extract with EtOAc. Dry over Na₂SO₄, concentrate under vacuum to obtain 4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline.

7. (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]hydrochloride

Stir 4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline (0.16 mmol) and 4-tert-butyl-aniline (0.32 mmol) in IPA (4 mL) at 80° C. for 6 hours. Cool the mixture and collect the precipitate to obtain (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]hydrochloride. Mass spec. 422.2.

I. (4-tert-Butyl-phenyl)-[2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride (cmpd 10) 1. 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide

Stir a mixture of 2-amino-4(3-trifluoromethyl-pyridin-2-yl)-benzo-nitrile (0.50 mmol) in 70% H₂SO₄ (10 ml) at 110° C. for 1 hour. Cool to room temperature, neutralize with NaOH, extract with EtOAc, dry over Na₂SO₄, and concentrate under vacuum. Purify the residue by flash chromatography (3:2 hexanes/EtOAc) to give 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide.

2. 2-acetylamino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide

To a solution of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (0.5 mmol) and pyridine (0.55 mmol) in THF (5 ml) add acetyl chloride (0.55 mmol). Stir the mixture 10 minutes at room temperature. Concentrate under vacuum, extract with EtOAc, wash with brine, dry over Na₂SO₄, and concentrate under vacuum. Triturate with ether to give 2-acetylamino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide.

3. 2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol

Suspend 2-acetylamino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide in 20 ml of 20% NaOH, stir for 30 minutes at room temperature. Filter, acidify to pH=6, extract with EtOAc, and concentrate under vacuum to give 2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

4. 4-chloro-2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline

Using procedures analogous to those already described 4-chloro-2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline is prepared from 2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

5. (4-tert-Butyl-phenyl)-[2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine

Using procedures analogous to those already described, (4-tert-Butyl-phenyl)-[2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine is prepared by condensing 4-chloro-2-methyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline with 4-tert-butylaniline. Mass spec. 436.2.

J. [7-(3-Methyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine (cmpd 11) 1. 7-[B(OH)₂]-3H-quinazolin-4-one

Reflux a mixture of 3-amino-4-carboethoxy-phenylboronic acid (1.46 g, 0.007 mol), prepared according to the procedure of Torssell et. al. (1957) Arkiv Kemi 10:497, and formamidine acetate (1.17 g, 0.008 mol) in methoxyethanol for 7 hours. Add an additional equivalent of formamidine acetate and continue to reflux for 16 hours. Cool the dark solution and remove the solvent under reduced pressure. Add ˜100 mL of water, stir for 10 minutes, and collect the light gray solid on a sintered glass funnel. Wash the solid with water (3×), dry, and recrystallize from methanol to give 7-[B(OH)₂]-3H-quinazolin-4-one as a white solid.

2. 7-(3-Methyl-pyridin-2-yl)-3H-quinazolin-4-one

Purge a solution of 7-[B(OH)₂]-3H-quinazolin-4-one (115 mg, 0.605 mmol), 2-bromo-3-methyl-pyridine (103 mg, 0.605 mmol), Na₂CO₃ (0.757 mL, 1.51 mmol, 2M aqueous solution), and DMF (4 mL) with nitrogen for 10 minutes. Add a catalytic amount of tetrakis-(triphenylphosphine)-palladium(0) (35 mg, 0.03 mmol) and heat at 95° C. for 16 hours. Cool the reaction mixture, dilute with water and extract with ethyl acetate. Dry the combined organic layers (Na₂SO₄), concentrate under reduced pressure, and purify the crude product using silica gel chromatography (MeOH/CH₂Cl₂) to give 7-(3-Methyl-pyridin-2-yl)-3H-quinazolin-4-one.

3. [7-(3-Methyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Using procedures analogous to those described above (see, for example, Schemes 1 and 2), [7-(3-Methyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine is prepared from 7-(3-Methyl-pyridin-2-yl)-3H-quinazolin-4-one in two steps. Mass spec. 380.1.

K. (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride (cmpd 9) 1. 2-p-tolyl-3-trifluoromethyl-pyridine

To a de-gassed mixture of 2-chloro-3-(trifluoromethyl)-pyridine (70.1 mmol), p-tolylboronic acid (70.6 mmol), and 2M Na₂CO₃ (175.0 mmol), in DME (200 mL) under nitrogen add Pd(PPh₃)₄ (2.8 mmol). Stir the mixture at 80° C. for overnight, concentrate, extract with EtOAc. Dry over Na₂SO₄, concentrate under vacuum, pass a silica gel pad to give 2-p-tolyl-3-trifluoromethyl-pyridine.

2. 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine

To a solution of 2-p-tolyl-3-trifluoromethyl-pyridine (8.4 mmol) in H₂SO₄ (6 mL) cautiously add fuming HNO₃ (2 ml). Stir the mixture 60 minutes at room temperature. Pour the mixture onto ice-water (30 mL), extract with EtOAc, neutralize with 1 N NaOH, dry over Na₂SO₄, and concentrate under vacuum to obtain 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine.

3. 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzoic acid

To a solution of 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine (7.1 mmol) in the mixture of pyridine (10 mL) and water (5 ml) add KMnO₄ (25.3 mmol) portionwise. Stir the mixture 4 hours at 110° C. then add another 25.3 mmol of KMnO₄ with 10 ml of water. Stir the mixture at 110° C. for overnight. Cool to room temperature, filter through celite pad. Concentrate the filtrate under vacuum, dilute with water, and wash the aqueous with EtOAc. Neutralize the aqueous with 2 N HCl and collect the precipitate to give 2-nitro-4(3-trifluoromethyl-pyridin-2-yl)-benzoic acid.

4. 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzoic acid

Hydrogenate the solution of 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzoic acid (3.84 mmol) in 95% EtOH (100 mL) with 10% Pd—C (150 mg) for over night. Filter through a celite pad and concentrate the filtrate to give 2-amino-4(3-trifluoromethyl-pyridin-2-yl)-benzoic acid.

5. 7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol

Stir the mixture of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzoic acid (1.95 mmol) in HCONH₂ (10 mL) for 4 hours at 145° C. Cool to room temperature, dilute with 20 ml of water, and collect the precipitate to give 7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

6. (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride

Using procedures analogous to those described above (see, for example, Schemes 1 and 2), (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amide hydrochloride is prepared from 7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol in two steps. Mass spec. 422.2.

L. [6-(propane-2-sulfonyl)-pyridin-3-yl]-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride (cmpd 12) 1. 2-Isopropylsulfanyl-5-nitro-pyridine

Stir the mixture of 2-mercapto-5-nitropyridine (10.0 mmol) and NaH (14.0 mmol) in DMA (10 ml) at room temperature for 30 minutes. Add 2-iodopropane (11.0 mmol) and stir overnight at room temperature. Dilute with H₂O, extract with EtOAc, wash with brine, dry over Na₂SO₄, and concentrate under vacuum. Purify the residue by flash chromatography (9:1 hexanes/EtOAc) to give 2-isopropyl-sulfanyl-5-nitro-pyridine.

2. 5-Nitro-2-(propane-2-sulfonyl)-pyridine

Heat the mixture of 2-isopropyl-sulfanyl-5-nitro-pyridine (3.5 mmol) and KMnO₄ (14.1 mmol) in HOAc (15 ml) at 110° C. for overnight. Filter, concentrate the filtrate, and neutralize with NaHCO₃. Extract with EtOAc, wash with brine, dry over Na₂SO₄, and concentrate under vacuum to give 2-(propyl-2-sulfonyl)-5-nitro-pyridine.

3. 6-(Propane-2-sulfonyl)-pyridin-3-ylamine

Suspend 2-(propyl-2-sulfonyl)-5-nitro-pyridine (0.44 mmol) in 10 ml of conc. HCl, add SnCl2 dihydrate (1.43 mmol), and stir for 2 hours at room temperature. Neutralize with NaOH. Extract with EtOAc, wash with brine, dry over Na₂SO₄, and concentrate under vacuum to give 6-(propane-2-sulfonyl)-pyridin-3-ylamine.

4. [6-(propane-2-sulfonyl)-pyridin-3-yl]-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride

Use the method described in Example 1H.7 to obtain [6-(propane-2-sulfonyl)-pyridin-3-yl]-[7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-amine hydrochloride. Mass spec. 473.1.

M. Additional Representative Substituted Quinazolin-4-ylamine Analogues

Using routine modifications, the starting materials may be varied and additional steps employed to produce other compounds encompassed by the present invention. Compounds listed in Table II were prepared using the above methods, with readily apparent modifications. TABLE II Representative Substituted Quinazoline-4-ylamine Analogues Compound Name MS 13.

(5-trifluoromethyl-pyridin-2-yl)-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 435.1 14.

(6-trifluoromethyl-pyridin-3-yl)-[7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 436.1 15.

[2-methyl-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 449.1 16.

(6-trifluoromethyl-pyridin-3-yl)-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 435.1 17.

(5-chloro-pyridin-2-yl)-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 336.2 18.

[2-chloro-7-(2-trifluoromethyl-phenyl)- pyrido[2,3-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 469.1 19.

[2-chloro-7-(2-trifluoromethyl-phenyl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 20.

[7-(2-trifluoromethyl-phenyl)- quinazolin-4-yl]-(5-trifluoromethyl- pyridin-2-yl)-amine 434.1 21.

(7-pyridin-2-yl-quinazolin-4-yl)-(5- trifluoromethyl-pyridin-2-yl)-amine 367.1 22.

(5-tert-butyl-isoxazol-3-yl)-(7-pyridin- 2-yl-quinazolin-4-yl)-amine 345.2 23.

(4-trifluoromethyl-phenyl)-[6-(2- trifluoromethyl-phenyl)-phthalazin-1- yl]amine 433.1 24.

(4-tert-Butyl-phenyl)-(6-pyridin-2-yl- phthalazin-1-yl)-amine 354.2 25.

(4-tert-Butyl-phenyl)-[7-(3- trifluoromethyl-pyridin-2-yl)-quinolin- 4-yl]-amine 421.2 26.

(4-trifluoromethoxy-phenyl)-7-(3- trifluoromethyl-pyridin-2-yl)- pyridol[3,2-d]pyrimidin-4-yl]-amine 451.1 27.

(4-tert-butyl-phenyl)-[7-(2- trifluoromethyl-phenyl)-quinazolin-4- yl]-amine 421.2 28.

(4-trifluoromethyl-phenyl)-[7-(2- trifluoromethyl-phenyl)-pyrido[3,2- d]pyrimidin-4-yl]amine 434.1 29.

[7-(1-Oxy-3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 450.1 30.

[7-(1-Oxy-pyridin-2-yl)-quinazolin-4- yl]-(4-trifluoromethyl-phenyl)-amine 382.1 31.

(4-Trifluoromethyl-phenyl)-[7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 435.1 32.

(4-tert-butyl-phenyl)-[2-methyl-7-(2- trifluoromethyl-phenyl)-quinazolin-4- yl]-amine 435.2 33.

[2-methyl-7-(2-trifluoromethyl-phenyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 447.1 34.

(4-tert-butyl-phenyl)-[2-isopropyl-7-(2- trifluoromethyl-phenyl)-quinazolin-4- yl]-amine 463.2 35.

N²-isobutyl-N⁴-(4-trifluoromethyl- phenyl)-7-(2-trifluoromethyl-phenyl)- pyrido[2,3-d]pyrimidine-2,4-diamine 463.2 36.

[4-(1,2,2,2-tetrafluoro-1- trifluoromethyl-ethyl)-phenyl-]-[7-(2- trifluoromethyl-phenyl)-quinazolin-4- yl]-amine 533.1 37.

(4-isopropyl-3-methyl-phenyl)-[7-(2- trifluoromethyl-phenyl)-pyrido[3,2- d]pyrimidin-4-yl]amine 422.2 38.

[2-Ethyl-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(1- methanesulfonyl-2,3-dihydro-1H-indol- 5-yl)-amine 513.1 39.

(4-tert-butyl-phenyl)-[6-(2- trifluoromethyl-phenyl)-isoquinolin-1- yl]-amine 420.2 40.

(4-trifluoromethyl-phenyl)-[6-(2- trifluoromethyl-phenyl)-isoquinolin-1- yl]amine 432.1 41.

N,N-dimethyl-4-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-ylamino]- benzenesulfonamide 473.1 42.

(4-trifluoromethanesulfonyl-phenyl)-[7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 498.1 43.

(4-trifluoromethanesulfonyl-phenyl)-[7- (3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 499.1 44.

[4-(pyrrolidine-1-sulfonyl)-phenyl]-[7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 499.1 45.

[4-(3-Dimethylamino-pyrrolidine-1- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 542.2 46.

[4-(piperdine-1-sulfonyl)-phenyl]-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 513.1 47.

[4-(morpholine-4-sulfonyl)-phenyl]-[7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 515.1 48.

[4-(morpholine-4-sulfonyl)-phenyl]-[7- (3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 516.1 49.

[4-(2-methyl-piperdine-1-sulfonyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 527.2 50.

[4-(2,6-Dimethyl-piperidine-1- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine (chiral) 541.2 51.

[4-(2-methyl-pyrrolidine-1-sulfonyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 513.1 52.

[4-(2,5-dimethyl-pyrrolidine-1- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 527.2 53.

[4-(2,6-dimethyl-morpholine-4- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 543.2 54.

[4-(2-methoxymethyl-pyrrolidine-1- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine (chiral) 543.2 55.

[4-(2-methoxymethyl-pyrrolidine-1- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine (chiral) 543.2 56.

N,N-diisopropyl-4-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]- benzenesulfonamide 529.2 57.

N-(2-Hydroxy-1,1-dimethyl-ethyl)-4- [7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]- benzenesulfonamide 517.1 58.

570.2 59.

516.1 60.

(1-{4-[7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-ylamino]- benzenesulfonyl}-pyrrolidin-2-yl)- methanol (chiral) 529.1 61.

(1-{4-[7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-ylamino]- benzenesulfonyl}-pyrrolidin-2-yl)- methanol (chiral) 529.1 62.

1-{4-[7-(3-Trifluoromethyl-pyridin-2- yl)-quinazolin-4-ylamino]- benzenesulfonyl}-pyrrolidin-3-ol (chiral) 515.1 63.

N²-isobutyl-N⁴-(4-trifluoromethyl- phenyl)-7-(3-trifluoromethyl-pyridin-2- yl)-quinazoline-2,4-diamine 505.2 64.

[6-Bromo-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 65.

4-(4-Trifluoromethyl-phenylamino)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazoline-6-carbonitrile 66.

N²-(3-Morpholin-4-yl-propyl)-N⁴-(4- trifluoromethyl-phenyl)-7-(2- trifluoromethyl-phenyl)-pyrido[2,3- d]pyrimidine-2,4-diamine 576.2 67.

[2-(2,6-Dimethyl-morpholin-4-yl)-7-(2- trifluoromethyl-phenyl)-pyridoll2,3- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 547.2 68.

[2-(3-Methyl-piperidin-1-yl)-7-(2- trifluoromethyl-phenyl)-pyrido[2,3- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 531.2 69.

(6-Chloro-pyridin-3-yl)-[7-(2- trifluoromethyl-phenyl)-quinazolin-4- yl]-amine 400.1 70.

1,1,1,3,3,3-Hexafluoro-2-{4-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]-phenyl}-propan- 2-ol 532.1 71.

(4-Trifluoromethoxy-phenyl)-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 450.1 72.

N-Isopropyl-4-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-ylamino]- benzenesulfonamide 487.1 73.

[4-(4-Methyl-piperazine-1-sulfonyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 528.2 74.

Pyrrolidin-1-yl-{4-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]-phenyl}- methanone 463.2 75.

[4-(3-Dimethylamino-pyrrolidine-1- sulfonyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4- yl]-amine 76.

N,N-Bis-(2-methoxy-ethyl)-4-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]- benzenesulfonamide 561.2 77.

N-(3-Chloro-propyl)-4-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]- benzenesulfonamide 521.1 78.

(4-Methanesulfonyl-phenyl)-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 444.1 79.

4[4-(Azetidine-1-sulfonyl)-phenyl]-[7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 485.1 80.

[4-(Propane-1-sulfonyl)-phenyl]-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 472.1 81.

(6-Isobutyl-pyridin-3-yl)-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 423.2 82.

N-tert-Butyl-4-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-ylamino]- benzenesulfonamide 501.1 83.

[4-(4-Fluoro-piperidine-1-sulfonyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 531.1 84.

N-tert-Butyl-N-methyl-4-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]- benzenesulfonamide 515.2 85.

2-Methyl-2-{4-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-ylamino]- phenyl}-propan-1-ol 438.2 86.

[4-(2,2,2-Trifluoro-1-methyl-ethyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 462.1 87.

[2-Chloromethyl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-[4-(2,2,2- trifluoro-1-methyl-ethyl)-phenyl]-amine 510.1 88.

[2-Ethyl-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-[4-(2,2,2-trifluoro- 1-methyl-ethyl)-phenyl]-amine 490.2 89.

2-[4-(4-Trifluoromethyl-phenylamino)- quinazolin-7-yl]-nicotinic acid ethyl ester 90.

2-{2-tert-Butyl-5-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-ylamino]- phenoxy}-ethanol 91.

[4-tert-Butyl-3-(2-methylamino- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 92.

[4-tert-Butyl-3-(2-ethylamino-ethoxy)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 93.

[4-tert-Butyl-3-(2-propylamino- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 94.

[4-tert-Butyl-3-(2-butylamino-ethoxy)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 95.

{4-tert-Butyl-3-[2-(2-methoxy- ethylamino)-ethoxy]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 96.

[4-tert-Butyl-3-(2-dimethylamino- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4- yl]-amine 97.

[4-tert-Butyl-3-(2-diethylamino- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 98.

[4-tert-Butyl-3-(2-pyrrolidin-1-yl- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 99.

[4-tert-Butyl-3-(2-piperidin-1-yl- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 100.

[4-tert-Butyl-3-(2-morpholin-4-yl- ethoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 101.

{4-tert-Butyl-3-[2-(4-methyl-piperazin- 1-yl)-ethoxy]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 102.

1-{4-[2-Methyl-7-(3-methyl-pyridin-2- yl)-pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-cyclobutanecarbonitrile 103.

1-{4-[2-Cyclobutyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin-4- ylamino]-phenyl}-cyclobutane carbonitrile 104.

(4-tert-Butyl-3-vinyl-phenyl)-[7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 105.

3-{2-tert-Butyl-5-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- ylamino]-phenoxy}-propan-1-ol 106.

[4-tert-Butyl-3-(3-methylamino- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 107.

[4-tert-Butyl-3-(3-ethylamino- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 108.

[4-tert-Butyl-3-(3-propylamino- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 109.

{4-tert-Butyl-3-[3-(2-methoxy- ethylamino)propxy]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 110.

[4-tert-Butyl-3-(3-dimethylamino- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 111.

[4-tert-Butyl-3-(3-diethylamino- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 112.

[4-tert-Butyl-3-(3-pyrrolidin-1-yl- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 113.

[4-tert-Butyl-3-(3-piperidin-1-yl- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 114.

[4-tert-Butyl-3-(3-morpholin-4-yl- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 115.

[4-tert-Butyl-3-(3-butylamino- propoxy)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 116.

2-{2-tert-Butyl-5-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- ylamino]-phenyl}-ethanol 117.

[4-tert-Butyl-3-(2-morpholin-4-yl- ethyl)-phenyl]-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine 118.

[4-tert-Butyl-3-(2-methylamino-ethyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[3,2-d]pyrimidin-4-yl]- amine 119.

[4-tert-Butyl-3-(2-piperidin-1-yl-ethyl)- phenyl]-[7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[3,2-d]pyrimidin-4-yl]- amine 120.

4-tert-Butyl-3-[2-(2,6-dimethyl- morpholin-4-yl)-ethyl]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- pyridol[3,2-d]pyrimidin-4-yl]-amine (cis) 121.

(S,S)-{4-tert-Butyl-3-[2-(2,6-dimethyl- morpholin-4-yl)-ethoxy]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 122.

(R,R)-{4-tert-Butyl-3-[2-(2,6-dimethyl- morpholin-4-yl)-ethoxy]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 123.

{4-tert-Butyl-3-[2-(2,6-dimethyl- morpholin-4-yl)-ethoxy]-phenyl}-[7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine (cis) 124.

2-{4-[2-Cyclobutyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin-4- ylamino]-phenyl }-2-methyl- propionitrile 125.

2-Methyl-2-{4-[2-methyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin-4- ylamino]-phenyl}-propionitrile 126.

N,N-Diethyl-2-{4-[2-methyl-7-(3- methyl-pyridin-2-yl)-pyridol[2,3- d]pyrimidin-4-ylamino]-phenyl}- isobutyramide 127.

[4-(2-Diethylamino-1,1-dimethyl- ethyl)-phenyl]-[2-methyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin-4- yl]-amine 128.

2-{3-[7-(3-Trifluoromethyl-pyridin-2- yl)-pyrido[3,2-d]pyrimidin-4-ylamino]- phenoxy}-ethanol 129.

[3-(2-Morpholin-4-yl-ethoxy)-phenyl]- [7-(3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 130.

{3-[2-(2,6-Dimethyl-morpholin-4-yl)- ethoxy]-phenyl}-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- yl]-amine (cis) 131.

2-{2-tert-Butyl-5-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- ylamino]-phenoxy}-1-morpholin-4-yl- ethanone 132.

2-{2-tert-Butyl-5-[7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin-4- ylamino]-phenoxy}-1-(2,6-dimethyl- morpholin-4-yl)-ethanone (cis) 133.

[2-Methyl-7-(3-methyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethoxy-phenyl)-amine 134.

(6-tert-Butyl-pyridin-3-yl)-[2-methyl-7- (3-methyl-pyridin-2-yl)-pyrido[2,3- d]pyrimidin-4-yl]-amine 135.

2-Methyl-2-{4-[2-methyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-propionitrile 136.

[4-(2-Methoxy-1,1-dimethyl-ethyl)- phenyl]-[2-methyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin-4- yl]-amine 137.

[2-Methyl-7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 138.

[2-Methyl-7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)-amine 139.

3-Methyl-3-{4-[2-methyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-butan-2-one 140.

3-Methyl-3-{4-[2-methyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin-4- ylamino]-phenyl}-butan-2-one 141.

[4-(1-Methoxy-1-methyl-ethyl)- phenyl]-[2-methyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 142.

(4-Methanesulfonyl-phenyl)-[2-methyl- 7-(3-trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-amine

Other compounds that were prepared are listed in Table III. Abbreviations used are: Ph=phenyl; Py=pyridin; Me=methyl; Et=ethyl; tBu=tert-butyl; thia=(1,3,4)thiadiazol; pyraz=1H-pyrazol; isopr=isopropyl; MeO=methoxy; EtO=ethoxy; PrO=propyloxy; MeA=methylamino; EtA=ethylamino; PrA=propylamino; BuA=butylamino; DMA=dimethylamino; DEA=diethylamino. Variable positions indicated in Table III are as shown on the following structure: TABLE III

Cmpd Ar₁ Ar₂ R₂ MS 143. 2-CF₃-Ph 4-cyclohexyl-Ph H 447.2 144. 2-CF₃-Ph 4-CF₃-Ph isopr 475.1 145. 2-CF₃-Ph 4-tBu-Ph CF3 489.2 146. 2-Cl-Ph 4-(CF(CF₃)₂)-Ph H 499.1 147. 2-F-Ph 4-(CF(CF₃)₂)-Ph H 483.1 148. 2-MeO-Ph 4-(CF(CF₃)₂)-Ph H 495.1 149. 2-CF₃-Ph 5-tBu-isox-3yl H 412.1 150. 2-CF₃-Ph 5-tBu-thia-2yl H 429.1 151. 2-CF₃-Ph 5-tBu-pyraz-3yl H 152. 3-CF₃-Py-2yl 6-CF₃-Py-3yl —NH-(6-CF₃-Py-3yl) 595.1 153. 3-CF₃-Py-2yl 6-Me-Py-3yl H 381.1 154. 3-CF₃-Py-2yl 5-Cl-Py-2yl H 155. Py-2yl 4-CF₃-Ph H 366.1 156. 3-F-Py-2yl 4-tBu-Ph H 372.2 157. 3-F-Py-2yl 4-CF₃-Ph H 384.1 158. 3-Cl-Py-2yl 4-tBu-Ph H 388.1 159. 3-Cl-Py-2yl 4-CF₃-Ph H 400.1 160. 3-CF₃-Py-2yl 4-CF₃-Ph H 434.1 161. 3-CF₃-Py-2yl 4-F-Ph H 384.1 162. 3-CF₃-Py-2yl 4-Cl-Ph H 400.1 163. 3-CF₃-Py-2yl 4-acetyl-Ph H 408.1 164. 3-CF₃-Py-2yl 4-cyano-Ph H 391.1 165. 3-CF₃-Py-2yl 4-(CF(CF₃)₂)-Ph H 534.1 166. 3-CF₃-Py-2yl 4-CF₃-Ph Me 448.1 167. 3-CF₃-Py-2yl 4-CF₃-Ph Cl 168. 3-CF₃-Py-2yl 4-CF₃-Ph —O—CH₂CH₂OH 494.1 169. 3-CF₃-Py-2yl 4-CF₃-Ph —O—CH₂CH₂-DMA 521.2 170. 3-CF₃-Py-2yl 4-CF₃-Ph —O—(CH₂)₃-DMA 535.2 171. 3-CF₃-Py-2yl 4-CF₃-Ph MeA 463.1 172. 3-CF₃-Py-2yl 4-CF₃-Ph DMA 477.1 173. 3-CF₃-Py-2yl 4-isopr-Ph H 408.2 174. 3-CF₃-Py-2yl 6-MeO-Py-3yl H 397.1 175. 3-CF₃-Py-2yl 3-Me-4-isopr-Ph H 422.2 176. 3-MeO-Py-2yl 4-CF₃-Ph H 396.1 177. 3-PrO-Py-2yl 4-CF₃-Ph H 424.2 178. 3-PrO-Py-2yl 4-isopr-Ph H 398.2 179. 2-Cl-Ph 4-CF₃-Ph H 399.1 180. 2,4-diCl-Ph 4-CF₃-Ph H 433.0 181. 2-Cl-Ph 4-tBu-Ph H 387.2 182. 2,4-diCl-Ph 4-tBu-Ph H 421.1 183. 3-CF₃-Py-2yl 4-CF₃-Ph MeO 184. 3-Cl-Py-2yl 6-CF₃-Py-3yl H 401.1 185. 2-CF₃-Ph 4-CF₃-Ph Morpholin-4yl 519.1 186. 3-CF₃-Py-2yl 3-MeO-Ph H 396.1 187. 3-CF₃-Py-2yl 6-tBu-Py-3yl H 423.2 188. 3-Cl-Py-2yl 6-tBu-Py-3yl H 389.1 189. 3-PrO-Py-2yl 6-tBu-Py-3yl H 413.2 190. 3-CF₃-Py-2yl 4-(isopr-SO₂)-Ph H 472.1 191. 3-CF₃-Py-2yl 5-CF₃-Py-2yl Me 449.1 192. 3-CF₃-Py-2yl 6-tBu-Py-3yl Me 437.2 193. 3-CF₃-Py-2yl 6-CF₃-Py-3yl CF₃ 503.1 194. 3-CF₃-Py-2yl 6-CF₃-Py-3yl n-Pr 477.1 195. 3-CF₃-Py-2yl 6-tBu-Py-3yl n-Pr 465.2 196. 3-CF₃-Py-2yl 5-CF₃-Py-2yl n-Pr 477.1 197. 3-CF₃-Py-2yl 6-CF₃-Py-3yl Et 463.1 198. 3-CF₃-Py-2yl 6-tBu-Py-3yl Et 199. 3-CF₃-Py-2yl 6-tBu-Py-3yl CF₃ 491.2 200. 3-CF₃-Py-2yl 4-(tBu-NH—SO₂)-Ph Me 515.2 201. 3-CF₃-Py-2yl 6-isopr-Py-3yl H 409.2 202. 3-CF₃-Py-2yl 6-isopr-Py-3yl n-Pr 451.2 203. 3-CF₃-Py-2yl 6-isopr-Py-3yl Me 423.2 204. 3-CF₃-Py-2yl 6-tBu-Py-3yl —O—(CH₂)CH₂OH 483.2 205. 3-CF₃-Py-2yl 6-CF₃-Py-3yl Cl 469.1 206. 3-CF₃-Py-2yl 6-CF₃-Py-3yl —N—(CH₂)₂CH(CH₃)₂ 520.2 207. 3-CF₃-Py-2yl 4-CF₃-Ph CN 325.0 208. 3-CF₃-Py-2yl 4-CF₃-Ph Ph 510.1 209. 3-CF₃-Py-2yl 5-CF₃-Py-2yl chloromethyl 483.1 210. 3-CF₃-Py-2yl 4-CF₃-Ph chloromethyl 211. 3-NO₂-Py-2yl 6-CF₃-Py-3yl H 412.1 212. 3-CF₃-Py-2yl 4-CF₃-Ph —CH₂SO₂CH₃ 526.1 213. 3-CF₃-Py-2yl 6-CF₃-Py-3yl —CH₂SO₂CH₃ 527.1 214. 3-Cl-Py-2yl 6-CF₃-Py-3yl Me 415.1 215. 3-CF₃-Py-2yl 4-(CH₃SO₂)-Ph H 445.1 216. 2-(CH₃SO₂)-Ph 4-CF₃-Ph H 217. 2-(CH₃SO₂)-Ph 6-CF₃-Py-3yl H 218. 3-(DMA-SO₂)-Py-2yl 4-CF₃-Ph H 219. 2-(CH₃SO₂)-Ph 4-CF₃-Ph Me 220. 2-(CH₃SO₂)-Ph 6-CF₃-Py-3yl Me 221. 3-(DMA-SO₂)-Py-2yl 4-CF₃-Ph Me 222. 3-CF₃-Py-2yl 4-CF₃-Ph —(CH₂)₂—S-Me 223. 3-CF₃-Py-2yl 6-CF₃-Py-3yl —(CH₂)₂—S-Me 224. 3-CF₃-Py-2yl 4-CF₃-Ph —(CH₂)₂—SO₂-Me 225. 3-cyano-Py-2yl 4-CF₃-Ph Me 226. 3-Cl-Py-2yl 4-(CF₃SO₂)-Ph H 464.0 227. 3-CF₃-Py-2yl 4-CF₃-Ph —CH₂—CN 473.1 228. 3-CH₃-Py-2yl 4-tBu-Ph H 368.2 229. 3-CH₃-Py-2yl 6-CF₃-Py-3yl H 381.1 230. 3-CH₃-Py-2yl 4-isopr-Ph H 354.2 231. 3-CH₃-Py-2yl 4-Et-Ph H 340.2

Other compounds that were prepared are listed in Table IV. Abbreviations used are as described above for Table III. Variable positions indicated in Table IV are as shown on the following structure: TABLE IV

Cmpd Ar₁ Ar₂ R₂ MS 232. 2-CF₃-Ph 4-CF₃-Ph —NH-(4-CF₃-Ph) 593.1 233. 2-CF₃-Ph 4-(CF₃-SO₂)-Ph Cl 532.2 234. 2-CF₃-Ph 4-(morpholin-4yl-SO₂)-Ph Cl 549.1 235. 2-CF₃-Ph 4-tBu-Ph —N—CH₂CH(CH₃)₂ 493.2 236. 2-CF₃-Ph 4-(morpholin-4yl-SO₂)-Ph —N—CH₂CH(CH₃)₂ 586.2 237. 2-CF₃-Ph 4-(morpholin-4yl-SO₂)-Ph —N-isopr 572.2 238. 2-CF₃-Ph 4-(morpholin-4yl-SO₂)-Ph —N—(CH₂)₂CH(CH₃)₂ 600.2 239. 2-CF₃-Ph 4-(morpholin-4yl-SO₂)-Ph N—(CH₂)₆CH(CH₃)₂ 240. 2-CF₃-Ph 6-CF₃-Py-3yl H 435.1 241. 2-CF₃-Ph 5-CF₃-Py-2yl Cl 469.1 242. 3-Cl-Py-2yl 4-tBu-Ph H 389.1 243. 3-Cl-Py-2yl 4-CF₃-Ph H 401.1 244. 3-Cl-Py-2yl 4-[C(CH₃)₂CN]-Ph H 400.1 245. 3-Cl-Py-2yl 4-[C(CH₃)₂CH₂OMe]-Ph H 419.2 246. 3-Cl-Py-2yl 4-isopr-Ph H 375.1 247. 3-Cl-Py-2yl 4-(2-butyl)-Ph H 389.1 248. 3-Cl-Py-2yl 4-Cl-Ph H 367.0 249. 3-Cl-Py-2yl 3-Me, 4-CF₃-Ph H 415.1 250. 3-Cl-Py-2yl 4-[CH(CH₃)(CF₃)]-Ph H 429.1 251. 3-Cl-Py-2yl 4-cyclopentyl-Ph H 401.1 252. 3-Cl-Py-2yl 4-cyclohexyl-Ph H 415.2 253. Py-2yl 4-CF₃-Ph H 367.1 254. Py-2yl 4-tBu-Ph H 355.2 255. Py-2yl 4-isopr-Ph H 341.2 256. Py-2yl 4-(2-butyl)-Ph H 355.2 257. Py-2yl 4-cyclopentyl-Ph H 367.2 258. Py-2yl 4-cyclohexyl-Ph H 381.2 259. 3-Cl-Py-2yl 6-CF₃-Py-3yl H 402.1 260. 3-Cl-Py-2yl 4-tBu-Ph Me 403.2 261. 3-Cl-Py-2yl 4-isopr-Ph Me 389.1 262. 3-Cl-Py-2yl 4-CF₃-Ph Me 415.1 263. 2-Cl-Ph 4-tBu-Ph H 388.1 264. 2-Cl-Ph 4-isopr-Ph H 374.1 265. 2-Cl-Ph 4-(2-butyl)-Ph H 388.1 266. 2-Cl-Ph 4-CF₃-Ph H 400.1 267. 3-CH₃-Py-2yl 4-tBu-Ph Me 383.2 268. 3-CH₃-Py-2yl 4-isopr-Ph Me 369.2 269. 3-CH₃-Py-2yl 4-CF₃-Ph Me 270. 3-CH₃-Py-2yl 4-(2-butyl)-Ph Me 271. 3-CH₃-Py-2yl 4-cyclopentyl-Ph Me 272. 3-CF₃-Py-2yl 4-tBu-Ph Me 273. 3-CF₃-Py-2yl 4-isopr-Ph Me 274. 3-CF₃-Py-2yl 4-CF₃-Ph Me 275. 3-CH₃-Py-2yl 4-(CH₃—SO₂)-Ph Me 276. 3-CH₃-Py-2yl 4-(CF₃—SO₂)-Ph Me 277. 3-CH₃-Py-2yl 6-CF₃-Py-3yl Me 278. 3-CF₃-Py-2yl 4-tBu-Ph H 279. 3-CF₃-Py-2yl 4-isopr-Ph H 280. 3-CF₃-Py-2yl 4-CF₃-Ph H 281. 3-CF₃-Py-2yl 4-cyclopentyl-Ph H 282. 3-CF₃-Py-2yl 4-(morpholin-4yl-SO₂)-Ph H 283. 3-CH₃-Py-2yl 4-(morpholin-4yl-SO₂)-Ph Me 284. 3-CH₃-Py-2yl 4-tBu-Ph cyclobutyl 423.2 285. 3-CH₃-Py-2yl 4-isopr-Ph cyclobutyl 409.2 286. 3-CH₃-Py-2yl 4-CF₃-Ph cyclobutyl 435.2 287. 3-CH₃-Py-2yl 4-(CF₃—SO₂)-Ph cyclobutyl 499.1 288. 3-CH₃-Py-2yl 5-CF₃-Py-2yl cyclobutyl 436.2 289. 3-CH₃-Py-2yl 6-CF₃-Py-3yl cyclobutyl

Other compounds that were prepared are listed in Table V. Abbreviations used are as described above for Table III. Variable positions indicated in Table V are as shown on the following structure: TABLE V

Cmpd Ar₁ Ar₂ R₂ MS 290. 3-CF₃-Py-2yl 4-tBu-Ph H 423.2 291. 3-CF₃-Py-2yl 4-(tBu-NH—SO₂)-Ph H 502.1 292. 3-CF₃-Py-2yl 6-tBu-Py-3yl H 424.2 293. 3-CF₃-Py-2yl 4-CF₃-Ph Me 449.1 294. 3-CF₃-Py-2yl 6-CF₃-Py-3yl Me 295. 3-CF₃-Py-2yl 5-CF₃-Py-2yl Me 450.1 296. 3-Me-Py-2yl 4-CF₃-Ph H 381.1 297. 3-Me-Py-2yl 6-CF₃-Py-3yl H 382.1 298. 3-Me-Py-2yl 4-tBu-Ph H 369.2 299. 3-Cl-Py-2yl 4-CF₃-Ph Me 415.1 300. 3-Cl-Py-2yl 6-CF₃-Py-3yl Me 416.1 301. 3-Cl-Py-2yl 4-(CF₃SO₂)-Ph Me 479.0 302. 3-Cl-Py-2yl 4-CF₃-Ph H 401.1 303. 3-Cl-Py-2yl 6-CF₃-Py-3yl H 402.1 304. 3-Cl-Py-2yl 4-(CF₃SO₂)-Ph H 465.0 305. 3-Cl-Py-2yl 6-tBu-Py-3yl Me 404.2 306. 3-Cl-Py-2yl 4-tBu-Ph Me 403.2 307. 3-CF₃-Py-2yl 4-isopr-Ph H 409.2

The Ar1-Matrix, Het-Matrix, and Ar2-Matrix tables below set forth a number of additional representative compounds that may be prepared by methods analogous to those shown above. Compounds can be formed by combining any element from the Het-Matrix with any elements from the Ar1 and Ar2 matrices. For example, the combination of element 111 from the Ar1-Matrix, with element 202 from the Het-matrix, gives the moiety 111202. This moiety is then combined with element 312 from the Ar2-matrix, to form compound 111202312, which is (7-pyridin-2-yl-quinazolin-4-yl)-(4-trifluoromethyl-phenyl)-amine.

Ar1-Matrix 101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

Het-Matrix 201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

Ar2-Matrix 301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

Example 2 Preparation of Representative Compounds

This Example illustrates the preparation of representative substituted 2-aminoalkyl-quinazolin-4-ylamine analogues.

A. [2-Pyrrolidin-1-ylmethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoro methyl-phenyl)-amine (cmpd 308) 1. 2-p-tolyl-3-trifluoromethyl-pyridine

To a de-gassed mixture of 2-chloro-3-(trifluoromethyl)-pyridine (70.1 mmol), p-tolylboronic acid (70.6 mmol), and 2M Na₂CO₃ (175.0 mmol), in dimethyl ether (DME; 200 mL) under nitrogen, add Pd(PPh₃)₄ (2.8 mmol). Stir the mixture at 80° C. overnight, concentrate, and extract with EtOAc. Dry over Na₂SO₄, concentrate under vacuum, and pass through a silica gel pad to give 2-p-tolyl-3-trifluoromethyl-pyridine.

2. 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine

To a solution of 2-p-tolyl-3-trifluoromethyl-pyridine (8.4 mmol) in H₂SO₄ (6 mL) cautiously add fuming HNO₃ (2 ml). Stir the mixture for 60 minutes at room temperature. Pour the mixture onto ice-water (30 mL), extract with EtOAc, neutralize with 1 N NaOH, dry over Na₂SO₄, and concentrate under vacuum to obtain 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine.

3. 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzoic acid

To a solution of 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine (7.1 mmol) in a mixture of pyridine (10 mL) and water (5 ml) add KMnO₄ (25.3 mmol) portionwise. Stir the mixture for 4 hours at 110° C. then add another 25.3 mmol of KMnO₄ with 10 ml of water. Stir the mixture at 110° C. overnight. Cool to room temperature, and filter through celite pad. Concentrate the filtrate under vacuum, dilute with water, and wash the aqueous solution with EtOAc. Neutralize the aqueous solution with 2 N HCl and collect the precipitate to give 2-nitro-4(3-trifluoromethyl-pyridin-2-yl)-benzoic acid.

4. 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide

Reflux a mixture of 2-amino-4(3-trifluoromethyl-pyridin-2-yl)-benzoic acid (25 g) with SOCl₂ (50 ml) for 4 hours and concentrate. Dissolve the residue in dichloromethane (DCM), cool with ice-water bath, pass NH₃ gas through the solution for 30 minutes, and stir for 15 minutes at room temperature. Concentrate and wash with water to give 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide.

5. 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide

Hydrogenate 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (1.0 g, 0.0032 mol) with 50 psi of H₂ and 100 mg of 10% Pd/C in ethanol. After 16 hours, filter the mixture through celite and concentrate under reduced pressure to give 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide as a solid.

6. 2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-3H-quinazolin-4-one

Heat a solution of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (100 mg, 0.356 mmol) in 2-chloro-1,1,1-trimethoxyethane (bp 138° C.) at 130° C. for 4 hours. Concentrate the mixture under reduced pressure to give 2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-3H-quinazolin-4-one as an oil which crystallizes on standing.

7. 4-chloro-2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline

Reflux a mixture of 2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-3H-quinazolin-4-one (obtained from the reaction above) and POCl₃ for 16 hours. Cool the mixture and concentrate under reduced pressure. Partition the residue between EtOAc and saturated NaHCO₃ solution. Wash the EtOAc portion with additional NaHCO₃ and then dry (Na₂SO₄) and concentrate under reduced pressure. Filter the brown residue through 2 inches of silica gel (1:1 EtOAc/hexanes eluent) and concentrate under reduced pressure to give 4-chloro-2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline.

8. [2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoro methyl-phenyl)-amine

Heat a mixture of 4-chloro-2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline (42 mg, 0.117 mmol) and 4-trifluoromethyl-aniline (19 mg, 0.117 mmol) in isopropyl alcohol (1 mL) at 75° C. for 4 hours. Cool the mixture and wash the precipitate with isopropyl alcohol followed by ether to give [2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine as the mono-HCl salt.

9. [2-Pyrrolidin-1-ylmethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Heat a solution of [2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine HCl (30 mg, 0.058 mmol) in pyrrolidine (1 mL) at 100° C. for 1 hour. Remove the excess pyrrolidine under reduced pressure and partition the residue between EtOAc and 10% NaOH solution. Dry the EtOAc layer (Na₂SO₄) and concentrate under reduced pressure to give [2-Pyrrolidin-1-ylmethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine as a foam. Mass Spec 517.2.

B. [2-(2,6-Dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (cis) (cmpd 309) 1. 4-Hydroxy-6-(2-trifluoromethyl-phenyl)-nicotinic acid ethyl ester

Dissolve Lithium bis(trimethylsilyl)amide (LiHMDS) (34 g, 0.20 mol) in dry THF (150 mL) and cool to −70° C. under N₂ atm. Add 4-dimethylamino-3-ethoxy-but-3-en-2-one (15 g, 0.081 mol; see J. Heterocyclic Chem. (1987) 24:1669) and 2-(trifluoromethyl)benzoyl chloride (20.0 g, 0.097 mol) in THF (50 mL) into the solution for 10 minutes. Remove the cooling bath and stir for 10 minutes. Add ammonium acetate (10 g) and acetic acid (200 mL) to the reaction mixture and distil THF under reduced pressure. Heat the mixture at 60-65° C. for 18 hours, cool and add water (250 mL) and CH₂Cl₂ (250 mL). Separate the CH₂Cl₂ layer, and extract the aqueous layer twice with CH₂Cl₂ (2×250 mL each). Combine the CH₂Cl₂ extracts, dry (MgSO₄), and evaporate. Purify by silica gel chromatography to provide 4-Hydroxy-6-(2-trifluoromethyl-phenyl)-nicotinic acid ethyl ester as a yellow solid.

2. 4-Chloro-6-(2-trifluoromethyl-phenyl)-nicotinic acid ethyl ester

Heat a mixture of 4-Hydroxy-6-(2-trifluoromethyl-phenyl)-nicotinic acid ethyl ester (9.0 g, 0.029 mol) in POCl₃ (22 g) at 110° C. for 2 hours. Evaporate the POCl₃, and add ice (100 g) followed by careful addition of saturated NaHCO₃. Extract with EtOAc, dry (MgSO₄), and evaporate to provide 4-chloro-6-(2-trifluoromethyl-phenyl)-nicotinic acid ethyl ester as a brown oil.

3. 4-Amino-6-(2-trifluoromethyl-phenyl)-nicotinamide

Heat a mixture of 4-Chloro-6-(2-trifluoromethyl-phenyl)-nicotinic acid ethyl ester (5.2 g) and 28% aq. NH₄OH (100 mL) in a 350 ml resealable pressure vessel for 60 hours. Cool, extract with EtOAc (3×100 mL each), dry (MgSO₄), and evaporate to provide the crude product. Purify by silica gel chromatography to provide 4-amino-6-(2-trifluoromethyl-phenyl)-nicotinamide as a solid.

4. 2-(2,6-Dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidin-4-ol

Heat a solution of 4-amino-6-(2-trifluoromethyl-phenyl)-nicotinamide (1 g, 3.5 mmol), 2,6-dimethyl-morpholin-4-yl)-acetic acid ethyl ester (2.85 g, 14 mmol), NaOEt (5.0 eq.) in EtOH (10 mL) for 20 hours. After cooling, concentrate the reaction mixture under reduced pressure, dilute the mixture with water (25 mL) and extract with EtOAc (3×25 mL each), then wash twice with water (25 mL each) and dry with MgSO₄. Evaporate, and purify by flash chromatography to obtain 2-(2,6-dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]-pyrimidin-4-ol.

5. 4-Chloro-2-(2,6-dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidine

Reflux a mixture of 2-(2,6-dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]-pyrimidin-4-ol (0.6 g), 2,6-lutidine (0.62 g), and POCl₃ (1.1 g) in CHCl₃ (15 mL) for 20 hours. Cool the mixture and concentrate under reduced pressure. Partition the residue between EtOAc and saturated NaHCO₃ solution. Wash the EtOAc portion with additional NaHCO₃ and then dry (Na₂SO₄) and concentrate under reduced pressure. Filter the brown residue through 2 inches of silica gel (1:1 EtOAc/hexanes eluent) and concentrate under reduced pressure to give 4-chloro-2-(2,6-dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidine.

6. [2-(2,6-Dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (cis)

Heat a mixture of 4-chloro-2-(2,6-dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidine (43.7 mg, 0.1 mmol) and 4-trifluoromethyl-aniline (16.1 mg, 0.1 mmol) in AcCN (1 mL) at 80° C. for 24 hours. Cool the mixture and wash the precipitate with ether to give 4-chloro-2-(2,6-dimethyl-morpholin-4-ylmethyl)-7-(2-trifluoromethyl-phenyl)-pyrido[4,3-d]pyrimidine as the mono-HCl salt. Mass Spec 561.2.

C. [2-Morpholin-4-ylmethyl-7(3-trifluoromethyl-pyridin-2-yl)-pyrido[3,2-a]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (cmpd 310) 1. 6′-Methoxy-3-trifluoromethyl-[2,3′]bipyridinyl

Heat a mixture of 2-chloro-3-trifluoromethylpyridine (37 g, 0.2 mol), 2-methoxypyridine-5-boronic acid (32 g, 0.21 mol), tetrakis(triphenylphosphine) palladium(0) (9 g, 7 mmol) and 2M potassium carbonate (150 mL) in toluene (500 mL) under a nitrogen atmosphere, at 90° C. for 8 hours. Cool the reaction mixture and separate the layers. Extract the aqueous layer with ethyl acetate (2×250 mL) and wash the combined organics with 4M sodium hydroxide (250 mL), water (250 mL), and brine (250 mL). Dry (MgSO₄) and concentrate under reduced pressure. Purify the oil by flash chromatography on silica gel (50% ether/50% hexane) to give the title compound (48.2 g, 95%) as a colorless oil.

2. 3-Trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one

Heat 6′-methoxy-3-trifluoromethyl-[2,3′]bipyridinyl (41 g, 0.16 mol) in 30% HBr/AcOH (100 mL) to reflux for 1 hour. Cool the mixture and filter, and wash the precipitate with ether (100 mL). Transfer the precipitate into 10M sodium hydroxide (500 mL) and stir for 1 hour, and treat the solution with hydrochloric acid until the solution is pH 7. Collect the white solid by filtration and air dry to give the title compound (36 g, 93%) as a white solid.

3. 5′-Nitro-3-trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one

To a solution of 3-trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one (25 g, 0.1 mol) in concentrated sulfuric acid (100 mL) at 0° C., add dropwise a solution of fuming nitric acid (35 mL) and concentrated sulfuric acid (10 mL). Heat the reaction mixture to 70° C. for 1 hour, cool and pour onto ice (500 mL). Filter the mixture and treat the filtrate with 10 M sodium hydroxide until the solution is at pH 4-5. Collect the precipitate by filtration and air dry to give the title compound (26.2 g, 92%) as a white solid.

4. 6′-Chloro-5′-nitro-3-trifluoromethyl-[2,3′]bipyridinyl

Heat a solution of 5′-nitro-3-trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one (25 g, 0.088 mol), thionyl chloride (300 mL) and DMF (3 mL) to reflux for 4 hours. Remove the volatiles by rotary evaporation and partition the residue between ethyl acetate (350 mL) and saturated sodium bicarbonate solution (250 mL). Extract the aqueous layer with further ethyl acetate (250 mL) and wash the combined organics with brine (250 mL). Dry (MgSO₄) and concentrate under reduced pressure to give the title compound (25 g, 93%) as a yellow oil.

5. 6′-Chloro-3-trifluoromethyl-[2,3′]bipyridinyl-5′-ylamine

To a solution of 6′-chloro-5′-nitro-3-trifluoromethyl-[2,3′]bipyridinyl (25 g, 0.082 mol) and calcium chloride (11 g, 0.1 mol) in ethanol (300 mL) and water (50 mL), add iron powder (45 g, 0.82 mol). Heat the solution to reflux for 1.5 hours, cool and filter through Celite. Concentrate the mixture under reduced pressure, re-dissolve in ethyl acetate (300 mL) and wash with brine (200 mL). Concentrate the solution under reduced pressure and purify by flash chromatography on silica gel (50% ether/50% hexane) to give the title compound (19 g, 85%) as a pale yellow solid.

6. 3-Amino-5-[3-(trifluoromethyl)(2-pyridyl)]pyridine-2-carboxamide

Heat a solution of 6′-chloro-3-trifluoromethyl-[2,3′]bipyridinyl-5′-ylamine (25 g, 0.091 mol), zinc cyanide (6.75 g, 0.058 mol), tris[dibenzylidineacetone]di-palladium (also referred to as “pd₂(dba)₃”; 2.63 g, 2.86 mmol), 1,1′-bis(diphenylphosphino)ferrocene (also referred to as “DPPF”; 3.16 g, 5.72 mmol) in DMF (250 mL) and water (2.5 mL), under a nitrogen atmosphere, at 120° C. for 1 hour. Add water (30 mL) and heat the solution at 120° C. for a further 4 hours to complete the hydrolysis. Cool the reaction to 0° C. and add a solution of saturated ammonium chloride (200 ml), water (200 mL) and concentrated ammonium hydroxide (50 mL). After stirring at 0° C. for 1 hour, filter the yellow precipitate, and wash with water (200 mL) and a 1:1 mixture of ether-hexane (200 mL). Dry the solid in air and then in a vacuum oven to give (23 g, 90%) of the title compound.

7. 2-(Chloromethyl)-7-[3-(trifluoromethyl)(2-pyridyl)]-3-hydropyridino[3,2-d]pyrimidin-4-one

Heat a solution of 3-amino-5-[3-(trifluoromethyl)(2-pyridyl)]pyridine-2-carboxamide (23 g, 81.5 mmol) and 2-chloro-1,1,1-trimethoxyethane (250 mL) at 130° C. for 1 hour. Remove the volatiles by evaporation and triturate the solid (50% ether/50% hexane) to give the title compound as a light brown solid (21 g, 76%).

8. 2-(Morpholin-4-ylmethyl)-7-[3-(trifluoromethyl)(2-pyridyl)]-3-hydropyridino[3,2-d]pyrimidin-4-one

Heat a solution of 2-(chloromethyl)-7-[3-(trifluoromethyl)(2-pyridyl)]-3-hydropyridino[3,2-d]pyrimidin-4-one (20 g, 0.058 mol), morpholine (15.66 g, 0.18 mol) in acetonitrile (500 mL) at 80° C. for 12 hours. Evaporate the solution and partition the residue between ethyl acetate (500 mL) and saturated sodium bicarbonate solution (500 mL). Extract the aqueous layer with further ethyl acetate (250 mL) and wash the combined organics with brine (500 mL). Dry (MgSO₄) and concentrate under reduced pressure to give the title compound (18.8 g, 83%) as a brown solid.

9. 4-({4-Chloro-7-[3-(trifluoromethyl)(2-pyridyl)]pyridino[3,2-d]pyrimidin-2-yl}methyl)-methylmorpholine

Heat a solution of 2-(morpholin-4-ylmethyl)-7-[3-(trifluoromethyl)(2-pyridyl)]-3-hydropyridino[3,2-d]pyrimidin-4-one (11.73 g, 0.03 mol), POCl₃ (13.8 g, 0.09 mol) and 2,6-lutidine (9.63 g, 0.09 mol) in chloroform (500 mL) at 60° C. for 12 hours. Evaporate the solution and partition the residue between ethyl acetate (500 mL) and saturated sodium bicarbonate solution (500 mL). Extract the aqueous layer with further ethyl acetate (250 mL) and wash the combined organics with brine (500 mL). Dry (MgSO₄) and concentrate under reduced pressure to give the title compound (11.5 g, 94%) as a brown solid.

10. [2-Morpholin-4-ylmethyl-7(3-trifluoromethyl-pyridin-2-yl)-pyrido[3,2-a]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Heat a solution of 4-({4-chloro-7-[3-(trifluoromethyl)(2-pyridyl)]pyridino[3,2-d]pyrimidin-2-yl}methyl)-methylmorpholine (12.2 g, 0.03 mol), 4-(trifluoromethyl)aniline (4.8 g, 0.03 mol) in acetonitrile (500 mL) at 80° C. for 12 hours. Evaporate the solution and partition the residue between ethyl acetate (500 mL) and saturated sodium bicarbonate solution (500 mL). Extract the aqueous layer with further ethyl acetate (2×250 mL) and wash the combined organics with brine (500 mL). Dry (MgSO₄) and concentrate under reduced pressure. Purify the residue by flash chromatography on silica gel (90% ether/10% hexane then 100% ether) to give the title compound (12.5 g, 78%). Mass Spec. 534.2.

D. [2-(2-Pyrrolidin-1-yl-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine (cmpd 311) 1. 3-Benzyloxy-propionic acid

In small portions, add sodium hydride (2.22 g, 60% dispersion in mineral oil, 55.4 mmol) to a cold (0° C.) solution of benzyl alcohol (4.0 g, 37 mmol) in toluene (100 mL). Add ethyl 3-bromopropionate (8.0 g, 44 mmol) dropwise to the mixture, allow the resulting solution to warm to room temperature and stir for 1 hour. Quench the reaction with the addition of water until all bubbling ceases. Dilute the mixture with ethyl acetate (100 mL) and extract with water (100 mL) and brine (100 mL). Dry the organic extract over Na₂SO₄ and remove the solvent under reduced pressure to yield the crude ester as a clear oil. Dissolve the oil in methanol (20 mL) and 6 N NaOH (20 mL), and stir for 1 hour. Concentrate the mixture (approximately 20 mL) and dilute with water (20 mL). Extract the aqueous mixture once with CH₂Cl₂ (40 mL). Acidify the aqueous phase with conc. HCl and extract with EtOAc (3×50 mL). Dry the combined EtOAc extracts over Na₂SO₄. Remove the solvent under reduced pressure to yield the title compound as a clear oil (2.28 g, 34.0%) that solidifies upon standing.

2. 2-(2-Benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-3H-quinazolin-4-one

Cool a solution of 3-benzyloxy-propionic acid (1.66 g, 9.19 mmol) in hexanes (40 mL) to 0° C. and add oxalyl chloride (3.50 g, 27.6 mmol) dropwise. After the addition is completed, add DMF (2 drops), and stir the resulting mixture for 1 hour. Remove the solvent under reduced pressure and dissolve the crude acid chloride in dry THF (20 mL). In a separate flask, dissolve 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (2.35 g, 8.37 mmol) in dry THF (40 mL) and pyridine (0.727 g, 9.19 mmol) and cool to 0° C. Add the solution containing the crude acid chloride dropwise to the second solution. Allow the mixture to warm to room temperature and stir for 1 hour. Add a solution of 10% NaOH_((aq)) (20 mL) to the mixture and stir the solution for 1 hour. Concentrate the mixture (˜20 mL), dilute with water (20 mL), and acidify with conc. HCl. Extract the resulting solution with EtOAC (3×50 mL). Wash the combined organic extracts with brine and dry over Na₂SO₄. Remove the solvent under reduced pressure to yield the title compound as a white solid (3.24 g, 82.9%).

3. 2-(2-Benzyloxy-ethyl)-4-chloro-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazoline

Dissolve 2-(2-benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-3H-quinazolin-4-one (3.24 g, 7.62 mmol) in CHCl₃ (40 mL) and 2,6-lutidine (2.45 g, 22.9 mmol). Add phosphorous oxychloride (1.77 mL, 19.0 mmol) dropwise and heat the resulting solution to reflux for 18 hours. Cool the solution and remove the solvent under reduced pressure. Partition the crude residue between EtOAc (200 mL) and saturated NaHCO₃ (aq) (200 mL). Remove the organic phase and extract the aqueous phase with EtOAc (200 mL). Combine the two organic extracts, wash with brine (200 mL), and dry over Na₂SO₄. Remove the solvent to yield the title compound as a light brown solid (2.47 g, 73.1%).

4. [2-(2-Benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Dissolve 2-(2-benzyloxy-ethyl)-4-chloro-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazoline (2.47 g, 5.57 mmol) into a solution of acetonitrile (50 mL) and 4-trifluoromethyl-aniline (0.986 g, 6.12 mmol). Heat the mixture to 80° C. for 2 hours, to form a white precipitate. Cool the solution in an ice bath and add diethyl ether (25 mL). Filter off the white precipitate and dry in a vacuum oven to yield the title compound as the mono-hydrochloride salt (2.96 g, 87.8%).

5. 2-[4-(4-Trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-ethanol

Dissolve [2-(2-benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine hydrochloride (2.96 g, 4.89 mmol) in MeOH (150 mL) and add 10% Pd/C (200 mg). Hydrogenate the mixture at 50 p.s.i. at 60° C. for 8 hours. Quickly filter the mixture through Celite and wash the Celite filter cake with hot MeOH (200 mL). Remove the solvent under reduced pressure to yield the mono-hydrochloride salt of title compound as a white solid (1.75 g, 69.5%).

6. [2-(2-Chloro-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Dissolve 2-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-ethanol hydrochloride (1.54 g, 2.99 mmol) in thionyl chloride (20 mL) and heat to 60° C. for 1 hour. Remove the excess thionyl chloride under reduced pressure and triturate the residue with diethyl ether to yield the mono-hydrochloride salt of the title compound as a light brown solid (1.48 g, 92.8%).

7. [2-(2-Pyrrolidin-1-yl-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Dissolve [2-(2-chloro-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine hydrochloride (20 mg, 0.0375 mmol) in CH₃CN/10% diisopropylethylamine (0.187 mL) and add a 0.2 N solution of pyrrolidine in acetonitrile (0.281 mL). Heat the mixture at 70° C. for 18 hours. Remove the solvent under reduced pressure and partition the crude reaction mixture between EtOAc (1 mL) and 1 N (NaOH). Remove the organic extract and extract the aqueous phase again with EtOAc (1 mL). Chromatograph the combined organic extracts through a small pad of silica gel, eluting with acetone to yield the title compound as a light brown solid (18 mg, 90%).

E. [2-(3-morpholin-4-yl-propyl)7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine hydrochloride (cmpd 313) 1. 3-[4-hydroxy-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester

To a solution of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (0.5 mmol) and pyridine (0.55 mmol) in THF (5 ml), add 3-chlorocarbonyl-propionic acid ethyl ester chloride (0.55 mmol). Stir the mixture for 20 minutes at room temperature, add 20 ml of 21% NaOEt in EtOH, and stir for 30 minutes at 50° C. Concentrate, add water, filter, acidify to pH 6, and collect the precipitate to give 3-[4-hydroxy-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester.

2. 3-[4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester

Using procedures analogous to those already described, 3-[4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester is prepared from 3-[4-hydroxy-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester.

3. 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester

Using procedures analogous to those already described, 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester is prepared from 3-[4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester.

4. 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid

To a mixture of 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid ethyl ester (0.5 mmol) in THF (20 ml) and H₂O (20 ml), add LiOH (1.5 mmol). Stir the mixture for 2 hours at 60° C. Concentrate, add water, extract with ether, acidify the aqueous layer to pH 4-5, extract with EtOAc, and concentrate to give 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid.

5. 1-morpholin-4-yl-3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propan-1-one (cmpd 312)

To a solution of 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazolin-2-yl]-propionic acid (0.5 mmol) and triethylamine (0.5 mmol) in DMF (10 ml), add benzotriazol-1-yl-oxy-tris(dimethylamino)phosphonium hexafluorophosphate (BOP; 0.5 mmol). Stir the mixture for 18 hours at room temperature, dilute with water, extract with EtOAc, and wash with brine. Concentrate to give 1-morpholin-4-yl-3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propan-1-one. Mass Spec. 575.2.

6. [2-(3-morpholin-4-yl-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine hydrochloride (cmpd 313)

To a solution of 1-morpholin-4-yl-3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-propan-1-one (0.14 mmol) in THF (20 ml), add LAH (0.67 mmol). Stir the mixture for 6 hours at room temperature, quench with 10% NaOH, extract with EtOAc, dry over Na₂SO₄, and add HCl-EtOAc. Collect the precipitate to give [2-(3-morpholin-4-yl-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine hydrochloride. Mass Spec. 561.2.

F. 4-trifluoromethylphenyl-[2-(2,6-dimethylmorphonli-4-ylmethyl)-7-(2-trifluoromethyl phenyl)-quinazolin-4-yl]-amine (cmpd 314) 1. 7-Bromo-2-chloromethyl-3H-quinazolin-4-one

Reflux a solution of 2-amino-4-bromobenzamide (27 g, 0.13 mol; see Joshi and Chaudhari, (1987) Indian J. Chem., Sect. B, 26B(6):602-4) in 2-chloro-1,1,1-trimethoxyethane (50 mL) for 30 minutes, during which time a large precipitate appears. Evaporate the mixture fully and triturate with ether to collect 28 g of 7-bromo-2-chloromethyl-3H-quinazolin-4-one as a white solid.

2. 7-Bromo-4-chloro-2-chloromethylquinazoline

Heat a mixture of 7-bromo-2-chloromethyl-3H-quinazolin-4-one (5 g, 18.2 mmol), 2,6-lutidine (5 g), and phosphorus oxychloride (5 mL) in 1,2-dimethoxyethane (500 mL) at 80° C. for 16 hours. Cool the mixture to room temperature and fully evaporate the mixture, then dilute with ether and wash with water. Dry the solvent (Na₂SO₄) and evaporate the ether to obtain 7-bromo-4-chloro-2-chloromethylquinazoline (3.5 g) as a yellow solid.

3. 7-Bromo-2-chloromethylquinazolin-4-yl)-(4-trifluoromethylphenyl)-amine

Heat a mixture of 7-bromo-4-chloro-2-chloromethylquinazoline (1168 mg, 4.0 mmol) and 4-(trifluoromethyl)aniline (644 mg, 4.0 mmol) in chloroform (50 mL) at 60° C. for 16 hours. Cool and collect the precipitated product 7-bromo-2-chloromethylquinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (1021 mg) as the HCL salt.

4. [7-Bromo-2-(cis-2,6-dimethylmorpholin-4-ylmethyl)-quinazolin-4-yl]-4-(trifluoro methylphenyl)-amine

Heat a mixture of 7-bromo-2-chloromethylquinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (416 mg, 1.0 mmol), cis-2,6-dimethylmorpholine (150 mg, 1.3 mmol), and triethylamine (202 mg, 2.0 mmol) in N,N-dimethylacetamide (7 mL) for 1 hour. Cool to room temperature, dilute with EtOAc (50 mL), and wash four times with water (25 mL each). Dry (Na₂SO₄) and evaporate. Triturate with ether to give [7-bromo-2-(cis-2,6-dimethylmorpholin-4-ylmethyl)-quinazolin-4-yl]-4-(trifluoromethylphenyl)-amine (430 mg) as a yellow solid.

5. [2-(cis-2,6-dimethylmorpholin-4-yloxymethyl)-7-(2-trifluoromethylphenyl)-quinazolin-4-yl]-(4-trifluoromethylphenyl)-amine

Under nitrogen, heat a mixture of [7-bromo-2-(cis-2,6-dimethylmorpholin-4-ylmethyl)-quinazolin-4-yl]-4-(trifluoromethylphenyl)-amine (75 mg, 0.15 mmol), 2-(trifluoromethyl phenyl)boronic acid (45 mg, 0.23 mmol), tetrakis(triphenylphosphine)palladium(0) (21 mg, 0.018 mmol), 2M Na₂CO₃ in water (1 mL), and 1,2-dimethoxyethane (5 mL) at 60° C. for 16 hours. Cool the mixture to room temperature, dilute with EtOAc, and wash twice with water (10 mL each). Dry the organic layer (Na₂SO₄) and evaporate. Purify by preparative TLC (9:1 CH₂CL₂:MeOH) to obtain [2-(cis-2,6-dimethylmorpholin-4-yloxymethyl)-7-(2-trifluoro methylphenyl)-quinazolin-4-yl]-(4-trifluoromethylphenyl)-amine (112 mg) as a yellow solid. Mass Spec. 560.2.

G. [7-(3-Methyl-pyridin-2-yl)-2-pyrrolidin-1-ylmethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (cmpd 315) 1. 5-Bromo-3-nitropyridine-2-carbonitrile

Heat a solution of 2-amino-5-bromo-3-nitropyridine (2.18 g, 10 mmol), cuprous cyanide (1.33 g, 15 mmol) and tert-butylnitrite (2.0 mL, 15 mmol) in acetonitrile (50 mL) to 60° C. for 2 hours. Cool the solution and partition between ethyl acetate (100 mL) and saturated aqueous NaHCO₃ (100 mL). Extract the aqueous solution with ethyl acetate (2×50 mL), wash with water (100 mL), brine (100 mL), dry (MgSO₄) and evaporate. Purify the solid by flash chromatography on silica gel (25% ether/75% hexane) to obtain the title compound as a pale yellow solid (934 mg, 41%).

2. 5-(3-Methyl(2-pyridyl))-3-nitropyridine-2-carbonitrile

Heat a solution of 5-bromo-3-nitropyridine-2-carbonitrile (228 mg, 1.0 mmol), tetrakis(triphenylphosphine)palladium(0) (15 mg), 3-methyl-2-pyridylzinc bromide (0.5 M in THF, 3 mL, 1.5 mmol) in THF (5 mL) to 60° C. for 2 hours. Cool the solution and partition between ethyl acetate (10 mL) and saturated aqueous NaHCO₃ (10 mL). Extract the aqueous solution with ethyl acetate (2×15 mL), wash with water (10 mL), brine (10 mL), dry (MgSO₄) and evaporate to obtain the title compound as a pale yellow solid (211 mg, 88%).

3. 3-Amino-5-(3-methyl(2-pyridyl))pyridine-2-carboxamide

Heat a solution of 5-(3-methyl(2-pyridyl))-3-nitropyridine-2-carbonitrile (1 g, 4.1 mmol), iron (2.3 g, 40 mmol) and calcium chloride (560 mg, 5 mmol) in ethanol (15 mL) and water (4 mL) to reflux for 1 hour. Cool the mixture, filter through Celite and wash with ethyl acetate. Evaporate the filtrate and re-dissolve the residue in ethyl acetate, wash with water and then with brine, dry (MgSO₄) and evaporate to obtain the title compound as a pale yellow solid (880 mg, 94%).

4. [7-(3-Methyl-pyridin-2-yl)-2-pyrrolidin-1-ylmethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine

The title compound is prepared from 3-amino-5-(3-methyl(2-pyridyl))pyridine-2-carboxamide in a manner analogous to that used for the preparation of [2-pyrrolidin-1-ylmethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine (Example 2.A, steps 6 to 9).

H. Additional Representative Substituted 2-Aminoalkyl-Quinazolin-4-ylamine Analogues

Those having skill in the art will recognize that the starting materials may be varied and additional steps employed to produce other compounds encompassed by the present invention. Compounds listed in Table VI were prepared using the above methods, with readily apparent modifications. TABLE VI Representative Substituted 2-Aminoalkyl-quinazolin-4-ylamine Analogues Compound Name MS 316.

(1-{3-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]-propyl}- piperidin-4-yl)-methanol 589.2 317.

(2,6-Dimethyl-morpholin-4-yl)-[4-(4- trifluoromethyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-methanone (cis) 318.

(4-Cyclopropyl-phenyl)-[2-(2,6- dimethyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine (cis) 319.

(4-sec-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine (cis) 320.

(4-tert-Butyl-phenyl)-[2-(1,1-dioxo- 1λ⁶-isothiazolidin-2-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 321.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-(2- trifluoromethyl-phenyl)-pyrido[4,3- d]pyrimidin-4-yl]-amine (cis) 549.3 322.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-amine (cis) 323.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine (cis) 550.3 324.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-(3-methyl- pyridin-2-yl)-quinazolin-4-yl]-amine (cis) 495.3 325.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-(6-methyl- pyridin-2-yl)-quinazolin-4-yl]-amine (cis) 495.3 326.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-pyridin-2-yl- quinazolin-4-yl]-amine (cis) 481.3 327.

(4-tert-Butyl-phenyl)-[2-piperidin-1- ylmethyl-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 519.2 328.

(4-tert-Butyl-phenyl)-[2-pyrrolidin-1- ylmethyl-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 505.2 329.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-pyrido[3,2- d]pyrimidin-4-yl]-amine (cis) 516.2 330.

(4-Trifluoromethyl-phenyl)-[7-(3- trifluoromethyl-pyridin-2-yl)-2-(3,3,5- trimethyl-azepan-1-ylmethyl)- quinazolin-4-yl]-amine 587.2 331.

(4-Trifluoromethyl-phenyl)-{7-(3- trifluoromethyl-pyridin-2-yl)-2-[2- (3,3,5-trimethyl-azepan-1-yl)-ethyl]- quinazolin-4-yl}-amine 601.3 332.

(6-tert-Butyl-pyridin-3-yl)-[7-(3- chloro-pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-pyrido[3,2- d]pyrimidin-4-yl]-amine (cis) 517.2 333.

(R)-(4-Isopropyl-phenyl)-[2-(2- methyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 334.

(R)-(4-tert-Butyl-phenyl)-[2-(2- methyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 335.

(R)-(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2-methyl-morpholin- 4-ylmethyl)-quinazolin-4-yl]-amine 501.2 336.

(R)-[2-(2-Methyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 337.

(R)-[7-(3-Chloro-pyridin-2-yl)-2-(2- methyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine 487.2 338.

(R)-[7-(3-Chloro-pyridin-2-yl)-2-(2- methyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 513.2 339.

(R,R)-(4-Chloro-phenyl)-[2-(2,6- dimethyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 527.2 340.

(R,R)-(4-Chloro-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 493.1 341.

(R,R)-(4-Ethyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 487.2 342.

(R,R)-(4-Fluoro-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 477.2 343.

(R,R)-(4-Isopropyl-phenyl)-[7-(3- chloro-pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 501.2 344.

(R,R)-(4-tert-Butyl-phenyl)-[7-(3- chloro-pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 515.2 345.

(R,R)-(6-tert-Butyl-pyridin-3-yl)-[2- (2,6-dimethyl-morpholin-4-ylmethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 550.3 346.

(R,R)-(6-tert-Butyl-pyridin-3-yl)-[7- (3-chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-amine 516.2 347.

(R,R)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 561.2 348.

(R,R)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 562.2 349.

(R,R)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine 535.3 350.

(R,R)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- ethyl-phenyl)-amine 521.2 351.

(R,R)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- (propane-2-sulfonyl)-phenyl]-amine 599.2 352.

(R,R)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine 562.2 353.

(R,R)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 527.2 354.

(R,R)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 528.2 355.

(R,R)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(6-isopropoxy- pyridin-3-yl)-amine 518.2 356.

(R,R)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-[4-(propane-2- sulfonyl)-phenyl]-amine 565.2 357.

(R,R)-1-{4-[7-(3-Chloro-pyridin-2-yl)- 2-(2,6-dimethyl-morpholin-4- ylmethyl)-quinazolin-4-ylamino]- phenyl}-ethanone 501.2 358.

(R,R)-1-{4-[7-(3-Chloro-pyridin-2-yl)- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-ylamino]-benzonitrile 484.2 359.

(S)-(4-Isopropyl-phenyl)-[2-(2-methyl- morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 360.

(S)-(4-tert-Butyl-phenyl)-[2-(2- methyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 361.

(S)-(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2-methyl-morpholin- 4-ylmethyl)-quinazolin-4-yl]-amine 501.2 362.

(S)-[2-(1-Propyl-pyrrolidin-2-yl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 363.

(S)-[2-(2-Methyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 364.

(S)-[2-Pyrrolidin-2-yl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 365.

(S)-[7-(3-Chloro-pyridin-2-yl)-2-(2- methyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-[4-(propane-2- sulfonyl)-phenyl]-amine 551.2 366.

(S)-[7-(3-Chloro-pyridin-2-yl)-2-(2- methyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine 487.2 367.

(S,S)-(4-Chloro-phenyl)-[2-(2,6- dimethyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 527.2 368.

(S,S)-(4-Chloro-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 493.1 369.

(S,S)-(4-tert-Butyl-phenyl)-[7-(3- chloro-pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 515.2 370.

(S,S)-(6-tert-Butyl-pyridin-3-yl)-[2- (2,6-dimethyl-morpholin-4-ylmethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 550.3 371.

(S,S)-(6-tert-Butyl-pyridin-3-yl)-[7-(3- chloro-pyridin-2-yl)-2-(2,6-dimethyl- morpholin-4-ylmethyl)-quinazolin-4- yl]-amine 516.2 372.

(S,S)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 373.

(S,S)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 562.2 374.

(S,S)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine 535.3 375.

(S,S)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- ethyl-phenyl)-amine 521.2 376.

(S,S)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-[4- (propane-2-sulfonyl)-phenyl]-amine 599.2 377.

(S,S)-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine 562.2 378.

(S,S)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 527.2 379.

(S,S)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 528.2 380.

(S,S)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-[4-(propane-2- sulfonyl)-phenyl]-amine 565.2 381.

(S,S)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine 501.2 382.

(S,S)-[7-(3-Chloro-pyridin-2-yl)-2- (2,6-dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-ethyl-phenyl)- amine 487.2 383.

[2-(1,1-Dioxo-1λ⁶-thiomorpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 582.1 384.

[2-(1,4-Dioxa-8-aza-spiro[4.5]dec-8- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 589.2 385.

[2-(1-Ethyl-piperidin-4-yl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 386.

[2-(1-Methanesulfonyl-piperidin-4-yl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 387.

[2-(1-Methyl-3,4-dihydro-1H- isoquinolin-2-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 593.2 388.

[2-(1-Propyl-piperidin-4-yl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 389.

[2-(1-Pyridin-4-ylmethyl-piperidin-4- yl)-7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 390.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(2-methoxy-phenyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine (cis) 391.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-methyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifloromethyl-phenyl)-amine (cis) 508.2 392.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-methyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine (cis) 507.2 393.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-pyridin-3-yl)-amine 562.2 394.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 561.2 395.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine (cis) 561.2 396.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(5- trifluoromethyl-pyridin-2-yl)-amine 562.2 397.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-[4- (2,2,2-trifluoro-1-methyl-ethyl)- phenyl]-amine 589.2 398.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine (cis) 562.2 399.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(5- trifluoromethyl-pyridin-2-yl)-amine (cis) 562.2 400.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine (cis) 562.2 401.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(6-trifluoromethyl-pyridine-3-yl)- amine (cis) 563.2 402.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 625.2 403.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine (cis) 625.2 404.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-methanesulfonyl-phenyl)- amine (cis) 572.2 405.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethanesulfonyl- phenyl)-amine (cis) 406.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-[4-(propane-1-sulfonyl)-phenyl]- amine (cis) 600.2 407.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-[4-(propane-2-sulfonyl)-phenyl]- amine (cis) 600.2 408.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-isopropyl-phenyl)-amine (cis) 536.3 409.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine (cis) 410.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-pyridin-2-yl-quinazolin-4- yl]-(4-trifluoromethyl-phenyl)-amine (cis) 493.2 411.

[2-(2-Ethyl-piperidin-1-ylethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 573.2 412.

[2-(2-Ethyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 559.2 413.

[2-(2-Methyl-piperidin-1-ylethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 559.2 414.

[2-(2-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 415.

[2-(3,3-Dimethyl-piperidin-1-ylethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 573.2 416.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 417.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 560.2 418.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 419.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine 560.2 420.

[2-(3,4-Dihydro-1H-isoquinolin-2- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 579.2 421.

[2-(3,5-Dimethyl-piperidin-1-ylethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 573.2 422.

[2-(3,5-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 423.

[2-(3,5-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 560.2 424.

[2-(3,5-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 425.

[2-(3,5-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine (cis) 560.2 426.

[2-(3-Hydroxy-piperidin-1-ylethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 561.2 427.

[2-(3-Methoxy-piperidin-1-ylethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 575.2 428.

[2-(3-Methyl-piperidin-1-ylethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 559.2 429.

[2-(3-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridine-3-yl)-amine 546.2 430.

[2-(3-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 431.

[2-(3-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 546.2 432.

[2-(3-Pyrrolidin-1-yl-propyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 433.

[2-(4-Cyclopentyl-piperazin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 600.2 434.

[2-(4-Ethoxy-piperidin-1-ylethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 589.2 435.

[2-(4-Ethyl-piperazin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 560.2 436.

[2-(4-Hydroxy-piperidin-1-ylethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 561.2 437.

[2-(4-Isopropyl-piperazin-1-ylmethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 574.2 438.

[2-(4-Methoxy-piperidin-1-ylethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 575.2 439.

[2-(4-Methyl-[1,4]diazepan-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 440.

[2-(4-Methyl-piperazin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(5-trifluoromethyl- pyridin-2-yl)-amine 547.2 441.

[2-(4-Methyl-piperazin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(2,2,2-trifluoro-1- methyl-ethyl)-phenyl]-amine 574.2 442.

[2-(4-Methyl-piperazin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 546.2 443.

[2-(4-Methyl-piperidin-1-ylethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 559.2 444.

[2-(4-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 445.

[2-(5,6-Dihydro-4H-pyrimidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 530.2 446.

[2-(5H-Tetrazol-5-yl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 502.1 447.

[2-(Benzylamino-methyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(5-trifluoromethyl- pyridin-2-yl)-amine 554.2 448.

[2-(Benzylamino-methyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 554.2 449.

[2-(Isobutylamino-methyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 519.2 450.

[2-(Isopropylamino-methyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 505.2 451.

[2-(Octahydro-quinolin-1-ylethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 599.2 452.

[2-(Octahydro-quinolin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 585.2 453.

[2-(tert-Butylamino-methyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 519.2 454.

[2-[(2-Methoxy-benzylamino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 548.2 455.

[2-[(2-Methoxy-ethylamino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 521.2 456.

[2-[(3-Methyl-butylamino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 457.

[2-[(4-Methoxy-benzylamino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 584.2 458.

[2-[(Allyl-methyl-amino)-ethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 531.2 459.

[2-[(Allyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 517.2 460.

[2-[(Allyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 518.2 461.

[2-[(Benzyl-cyclopropyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 593.2 462.

[2-[(Benzyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 568.2 463.

[2-[(Benzyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 567.2 464.

[2-[(Butyl-ethyl-amino)-ethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 561.2 465.

[2-[(Butyl-ethyl-amino)-methyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 547.2 466.

[2-[(Butyl-methyl-amino)-ethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 547.2 467.

[2-[(Butyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 468.

[2-[(Cyclohexyl-ethyl-amino)-ethyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 587.2 469.

[2-[(Cyclohexyl-ethyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 573.2 470.

[2-[(Cyclohexyl-methyl-amino)-ethyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 573.2 471.

[2-[(Cyclohexyl-methyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 472.

[2-[(Cyclopropylmethyl-propyl- amino)-ethyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 573.2 473.

[2-[(Cyclopropylmethyl-propyl- amino)-methyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 474.

[2-[(Cyclopropylmethyl-propyl- amino)-methyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 560.2 475.

[2-[(Cyclopropylmethyl-propyl- amino)-methyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 476.

[2-[(Cyclopropylmethyl-propyl- amino)-methyl]-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine 560.2 477.

[2-[(Ethyl-isopropyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 478.

[2-[(Hexyl-methyl-amino)-ethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 575.2 479.

[2-[(Hexyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 561.2 480.

[2-[(Indan-1-yl-methyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 593.2 481.

[2-[(Isopropyl-ethyl-amino)-ethyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 547.2 482.

[2-[(Isopropyl-methyl-amino)-ethyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 483.

[2-[(Isopropyl-methyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 519.2 484.

[2-[(Methyl-propyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 519.2 485.

[2-[(Propyl-methyl-amino)-ethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 486.

[2-[(Tetrahydro-thiopyran-4-ylamino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 564.2 487.

[2-[1-(1-Methyl-1H-imidazol-2- ylmethyl)-piperidin-4-yl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 488.

[2-[2-(1,4-Dioxa-8-aza-spiro[4.5]dec- 8-yl)-ethyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 603.2 489.

[2-[2-(1-Methyl-3,4-dihydro-1H- isoquinolin-2-yl)-ethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 607.2 490.

[2-[2-(2,6-Dimethyl-morpholin-4-yl)- ethyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 491.

[2-[2-(3,4-Dihydro-1H-isoquinolin-2- yl)-ethyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 593.2 492.

[2-[2-(4-Methyl-piperazin-1-yl)-ethyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 560.2 493.

[2-[2-(Benzyl-cyclopropyl-amino)- ethyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 607.2 494.

[2-[2-(Benzyl-methyl-amino)-ethyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 581.2 495.

[2-[2-(Indan-1-yl-methyl-amino)- ethyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 607.2 496.

[2-[2-(Methyl-phenethyl-amino)- ethyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 595.2 497.

[2-[3-(2,6-Dimethyl-morpholin-4-yl)- propyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 590.2 498.

[2-[3-(2,6-Dimethyl-morpholin-4-yl)- propyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 589.2 499.

[2-[3-(2,6-Dimethyl-morpholin-4-yl)- propyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine (cis) 589.2 500.

[2-[3-(3-Methyl-piperidin-1-yl)- propyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 573.2 501.

[2-[3-(4-Methyl-piperazin-1-yl)- propyl]-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 574.2 502.

[2-[4-(2-Diethylamino-ethyl)- piperazin-1-ylmethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 631.3 503.

[2-[4-(2-Dimethylamino-ethyl)- piperazin-1-ylmethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 603.3 504.

[2-[4-(2-Methoxy-ethyl)-piperazin-1- ylmethyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 590.2 505.

[2-[4-(2-Morpholin-4-yl-ethyl)- piperazin-1-ylmethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 645.3 506.

[2-[4-(2-Pyrrolidin-1-yl-ethyl)- piperazin-1-ylmethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 629.3 507.

[2-[4-(3-Dimethylamino-propyl)- piperazin-1-ylmethyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 617.3 508.

[2-{[(2-Fluoro-benzyl)-methyl-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 585.2 509.

[2-{[(3-Fluoro-benzyl)-methyl-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 585.2 510.

[2-{[(Pyridin-2-ylmethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 555.2 511.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(5- trifluoromethyl-pyridin-2-yl)-amine 580.2 512.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-[4-(2,2,2- trifluoro-1-methyl-ethyl)-phenyl]- amine 607.2 513.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 579.2 514.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 580.2 515.

[2-{[Ethyl-(2-methyl-allyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 545.2 516.

[2-{[Ethyl-(2-methyl-allyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 546.2 517.

[2-{[Methyl-(1-phenyl-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 581.2 518.

[2-{[Methyl-(1-phenyl-propyl)- amino]-methyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 595.2 519.

[2-{[Methyl-(2-methyl-benzyl)- amino]-methyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 581.2 520.

[2-{[Methyl-(2-phenyl-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 581.2 521.

[2-{2-[(2-Fluoro-benzyl)-methyl- amino]-ethyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 599.2 522.

[2-{2-[(3-Fluoro-benzyl)-methyl- amino]-ethyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 599.2 523.

[2-{2-[Bis-(2-methoxy-ethyl)-amino]- ethyl}-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 593.2 524.

[2-{2-[Ethyl-(2-methyl-allyl)-amino]- ethyl}-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 559.2 525.

[2-{2-[Methyl-(1-phenyl-ethyl)- amino]-ethyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 595.2 526.

[2-{2-[Methyl-(1-phenyl-propyl)- amino]-ethyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 609.2 527.

[2-{2-[Methyl-(2-methyl-benzyl)- amino]-ethyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 595.2 528.

[2-Azepan-1-ylethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 559.2 529.

[2-Azepan-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 546.2 530.

[2-Azepan-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 531.

[2-Azocan-1-ylethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 573.2 532.

[2-Azocan-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 559.2 533.

[2-Cyclohexylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 534.

[2-Diallylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 557.2 535.

[2-Diallylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 544.2 536.

[2-Diallylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 543.2 537.

[2-Dibutylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 589.3 538.

[2-Dibutylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 576.2 539.

[2-Dibutylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 575.2 540.

[2-Diethylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 541.

[2-Diethylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 519.2 542.

[2-Dihexylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 645.3 543.

[2-Dihexylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 631.3 544.

[2-Dimethylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.

[2-Dimethylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 491.2 546.

[2-Dipentylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 617.3 547.

[2-Dipentylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 603.3 548.

[2-Dipropylaminoethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 561.2 549.

[2-Dipropylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 548.2 550.

[2-Dipropylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 548.2 551.

[2-Dipropylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amime 547.2 552.

[2-Ethylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 491.2 553.

[2-Hexylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 547.2 554.

[2-Imidazol-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 555.

[2-Imidazol-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 515.1 556.

[2-Imidazol-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 557.

[2-Methylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 477.1 558.

[2-Morpholin-4-ylethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 547.2 559.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 535.2 560.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-2-yl)-amine 535.2 561.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(5-trifluoromethyl- pyridin-2-yl)-amine 534.2 562.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(2,2,2-trifluoro-1- methyl-ethyl)-phenyl]-amine 561.2 563.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 534.2 564.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 597.1 565.

[2-Morpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 533.2 566.

[2-Octylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 575.2 567.

[2-Piperidin-1-ylethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 545.2 568.

[2-Piperidin-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(2,2,2-trifluoro-1- methyl-ethyl)-phenyl]-amine 559.2 569.

[2-Piperidin-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 531.2 570.

[2-Piperidin-4-yl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 571.

[2-Thiomorpholin-4-ylethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 563.2 572.

[2-Thiomorpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 550.1 573.

[2-Thiomorpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 550.1 574.

[2-Thiomorpholin-4-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 549.1 575.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine (cis) 527.2 576.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine (cis) 528.2 577.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine (cis) 591.1 578.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine (cis) 528.2 579.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- pyrido[3,2-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine (cis) 529.2 580.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine (cis) 592.1 581.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine (cis) 582.

[7-(3-Chloro-pyridin-2-yl)-2-(3,5- dimethyl-piperazin-1-ylmethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 526.2 583.

[7-(3-Chloro-pyridin-2-yl)-2-imidazol- 1-ylmethyl-pyrido[3,2-d]pyrimidin-4- yl]-(4-trifluoromethyl-phenyl)-amine 584.

{1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidin-4-yl}-methanol 561.2 585.

{1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidin-2-yl}-methanol 561.2 586.

{1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidin-3-yl}-methanol 561.2 587.

{1-[7-(3-Trifluoromethyl-pyridin-2- yl)-4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperidin-4-yl}-methanol 562.2 588.

{1-[7-(3-Trifluoromethyl-pyridin-2- yl)-4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperidin-3-yl}-methanol 562.2 589.

1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidin-4-ol 547.2 590.

1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidin-3-ol 547.2 591.

1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidine-4-carboxylic acid amide 574.2 592.

1-[7-(3-Trifluoromethyl-pyridin-2-yl)- 4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperidin-4-ol 548.2 593.

1-[7-(3-Trifluoromethyl-pyridin-2-yl)- 4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperidin-3-ol 548.2 594.

1-[7-(3-Trifluoromethyl-pyridin-2-yl)- 4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperidine-4-carboxylic acid amide 575.2 595.

1-{2-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-4-(4-trifluoromethyl- phenylamino)-quinazolin-7-yl]- phenyl}-ethanone (cis) 596.

1-{2-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]-ethyl}- piperidine-4-carboxylic acid amide 588.2 597.

1-{3-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]-propyl- piperidin-4-ol 575.2 598.

1-{3-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]- propyl}piperidin-3-ol 575.2 599.

1-{4-[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-ylamino]-phenyl}-ethanone (cis) 600.

1-{4-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]- piperidin-1-yl}-ethanone 601.

1-{4-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]- piperidin-1-yl}-propan-1-one 602.

1-{4-[7-(3-Trifluoromethyl-pyridin-2- yl)-4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperazin-1-yl}-ethanone 575.2 603.

1-Pyrrolidin-1-yl-3-[4-(4- trifluoromethyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-propan-1-one 559.2 604.

2-(1-{3-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]-propyl}- piperidin-4-yl)-ethanol 603.2 605.

2-{[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- amino}-ethanol 507.1 606.

2-{1-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperidin-4-yl}-ethanol 575.2 607.

2-{1-[7-(3-Trifluoromethyl-pyridin-2- yl)-4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperidin-4-yl}-ethanol 576.2 608.

2-{4-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- piperazin-1-yl}-ethanol 576.2 609.

2-{4-[7-(3-Trifluoromethyl-pyridin-2- yl)-4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-ylmethyl]- piperazin-1-yl}-ethanol 577.2 610.

2-Methyl-2-{[4-(4-trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- amino}-propan-1-ol 611.

4-(4-Trifluoromethyl-phenylamino)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazoline-2-carboxylic acid dimethylamide 612.

4-(4-Trifluoromethyl-phenylamino)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazoline-2-carboxylic acid methylamide 613.

4-(4-Trifluoromethyl-phenylamino)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazoline-2-carboxylic acid (2- dimethylamino-ethyl)-amide 614.

4-(4-Trifluoromethyl-phenylamino)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazoline-2-carboxylic acid (2- morpholin-4-yl-ethyl)-amide 615.

4-{2-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]-ethyl}- piperazine-1-carbaldehyde 574.2 616.

N,N,N′-Trimethyl-N′-[4-(4- trifluoromethyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-ylmethyl]-propane-1,3- diamine 617.

N-[4-(4-Trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-ylmethyl]- methanesulfonamide 541.1 618.

[2-Dimethylaminomethyl-7-(3-methyl- pyridin-2-yl)-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine 411.2 619.

(4-Isopropyl-phenyl)-[7-(3-methyl- pyridin-2-yl)-2-morpholin-4-ylmethyl- quinazolin-4-yl]-amine 453.3 620.

(4-Isopropyl-phenyl)-[7-(3-methyl- pyridin-2-yl)-2-thiomorpholin-4- ylmethyl-quinazolin-4-yl]-amine 469.2 621.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-methyl-pyridin-2-yl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine 479.3 622.

[2-[(Ethyl-propyl-amino)-methyl]-7- (3-methyl-pyridin-2-yl)-quinazolin-4- yl]-(4-isopropyl-phenyl)-amine 439.3 623.

(4-Isopropyl-phenyl)-[2-[(methyl- propyl-amino)-methyl]-7-(3-methyl- pyridin-2-yl)-quinazolin-4-yl]-amine 439.3 624.

[2-[(Ethyl-isopropyl-amino)-methyl]- 7-(3-methyl-pyridin-2-yl)-quinazolin- 4-yl]-(4-isopropyl-phenyl)-amine 453.3 625.

[2-[(Isopropyl-methyl-amino)-methyl]- 7-(3-methyl-pyridin-2-yl)-quinazolin- 4-yl]-(4-isopropyl-phenyl)-amine 439.3 626.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-methyl-pyridin-2-yl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine 499.3 627.

[2-Pyridin-4-yl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 511.1 628.

[2-Pyridin-3-yl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 511.1 629.

[2-(6-Methoxy-pyridin-3-yl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 541.1 630.

[2-(6-Pyrrolidin-1-yl-pyridin-3-yl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoro methyl-phenyl)-amine 580.2 631.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-pyridin-4-yl- quinazolin-4-yl]-amine (cis) 481.3 632.

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-pyridin-3-yl- quinazolin-4-yl]-amine (cis) 481.3 633.5

(4-tert-Butyl-phenyl)-[2-(2,6-dimethyl- morpholin-4-ylmethyl)-7-pyrimidin-5- yl-quinazolin-4-yl]-amine (cis) 634.

(4-tert-Butyl-phenyl)-[7-(2,4- dimethoxy-pyrimidin-5-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-amine (cis) 635.

[7-(3-Chloro-pyridin-2-yl)-2-(2,6- dimethyl-morpholin-4-ylmethyl)- pyrido[3,2-d]pyrimidin-4-yl]-[4- (morpholine-4-sulfonyl)-pheynl]-amine 636.

[2-Dimethylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 637.

[2-[(Methyl-propyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 638.

[2-[(Isopropyl-methyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 639.

[2-[(Ethyl-propyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 640.

[2-[(Bis-ethoxymethyl-amino)- methyl]-7-(3-methyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 641.

[2-Dipropylaminomethyl-7-(3-methyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 642.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-methyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 643.

1-[7-(3-Methyl-pyridin-2-yl)-4-(4- trifluoromethyl-phenylamino)- quinazolin-2-ylmethyl]-pyrrolidin-3-ol (chiral) 644.

[2-{[Methyl-(1-phenyl-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 645.

[2-[(Indan-1-yl-methyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 646.

[2-{[Methyl-(1-phenyl-propyl)- amino]-methyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 647.

[2-(1-Methyl-3,4-dihydro-1H- isoquinolin-2-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 648.

[2-[(Benzyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 649.

[2-(3,4-Dihydro-1H-isoquinolin-2- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 650.

[2-{[(3-Fluoro-benzyl)-methyl-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 651.

[2-{[Methyl-(2-methyl-benzyl)- amino]-methyl}-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 652.

[2-{[(2-Fluoro-benzyl)-methyl-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 653.

[2-[(Benzyl-cyclopropyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 654.

[2-[(Methyl-phenethyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 655.

[2-Pyrrolidin-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 656.

[2-Piperidin-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 657.

[2-(4-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 658.

[2-Azepan-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 659.

[2-Azocan-1-ylmethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 660.

(6-Trifluoromethyl-pyridin-3-yl)-[7-(3- trifluoromethyl-pyridin-2-yl)-2-(3,3,5- trimethyl-azepan-1-ylmethyl)- quinazolin-4-yl]-amine 661.

[2-(1,4-Dioxa-8-aza-spiro[4.5]dec-8- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 662.

[2-(Octahydro-quinolin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 663.

[2-Dimethylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 664.

[2-[(Allyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 665.

[2-Diethylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 666.

[2-[(Methyl-propyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 667.

[2-[(Butyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 668.

[2-[(Ethyl-isopropyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 669.

[2-Diallylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 670.

[2-Dipropylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 671.

[2-[(Butyl-ethyl-amino)-methyl]-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 672.

[2-[(Cyclopropylmethyl-propyl- amino)-methyl]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 673.

[2-[(Hexyl-methyl-amino)-methyl]-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 674.

[2-Dibutylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 675.

[2-[(Isopropyl-methyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 676.

[2-(2-Methyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 677.

[2-{[Ethyl-(2-methyl-allyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 678.

[2-[(Cyclohexyl-methyl-amino)- methyl]-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 679.

[2-(2-Ethyl-piperidin-1-ylmethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 680.

[2-[(Cyclohexyl-ethyl-amino)-methyl]- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 681.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 682.

[2-Dipentylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 683.

[2-Dihexylaminomethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 684.

[2-(3,5-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 685.

{1-[7-(3-Methyl-pyridin-2-yl)-4-(4- trifluoromethyl-phenylamino)- quinazolin-2-ylmethyl]-pyrrolidin-3- yl}-methanol (chiral) 686.

{1-[7-(3-Methyl-pyridin-2-yl)-4-(4- trifluoromethyl-phenylamino)- quinazolin-2-ylmethyl]-pyrrolidin-3- yl}-methanol (chiral) 687.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-methyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 688.

[2-Azetidin-3-yl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 689.

[2-(2,2-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl[-(4- trifluoromethyl-phenyl)-amine 690.

[7-(3-Chloro-pyridin-2-yl)-2-(2,2- dimethyl-morpholin-4-ylmethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 691.

(4-Cyclopropyl-phenyl)-[2-(2,2- dimethyl-morpholin-4-ylmethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 692.

[2-(2,2-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine 693.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-methyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 694.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-methyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 695.

[2-(2,6-Dimethyl-morpholin-4- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine (cis) 696.

[2-{[Bis-(2-methoxy-ethyl)-amino]- methyl}-7-(3-trifluoromethyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 697.

[2-(3,3-Dimethyl-piperidin-1- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)-amine 698.

2-{[4-(4-tert-Butyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-ylmethyl]-propyl- amino}-ethanol 699.

{1-[4-(4-tert-Butyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-ylmethyl]-pyrrolidin-2- yl}-methanol 700.

[2-(1,1-Dioxo-1λ⁶-[1,2]thiazinan-2- ylmethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine

Example 3 Preparation of Representative Compounds

This Example illustrates the preparation of representative substituted 2-hydroxyalkyl-quinazolin-4-ylamine analogues.

A. [2-Isopropoxymethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine ester (compound 701) 4. 2-p-tolyl-3-trifluoromethyl-pyridine

To a de-gassed mixture of 2-chloro-3-(trifluoromethyl)-pyridine (70.1 mmol), p-tolylboronic acid (70.6 mmol), and 2M Na₂CO₃ (175.0 mmol), in dimethyl ether (DME; 200 mL) under nitrogen add Pd(PPh₃)₄ (2.8 mmol). Stir the mixture at 80° C. overnight, concentrate, and extract with EtOAc. Dry over Na₂SO₄, concentrate under vacuum, and pass through a silica gel pad to give 2-p-tolyl-3-trifluoromethyl-pyridine.

5. 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine

To a solution of 2-p-tolyl-3-trifluoromethyl-pyridine (8.4 mmol) in H₂SO₄ (6 mL) cautiously add fuming HNO₃ (2 ml). Stir the mixture for 60 minutes at room temperature. Pour the mixture onto ice-water (30 mL), extract with EtOAc, neutralize with 1 N NaOH, dry over Na₂SO₄, and concentrate under vacuum to obtain 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine.

6. 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzoic acid

To a solution of 2-(4-methyl-3-nitro-phenyl)-3-(trifluoromethyl)-pyridine (7.1 mmol) in a mixture of pyridine (10 mL) and water (5 ml), add KMnO₄ (25.3 mmol) portionwise. Stir the mixture for 4 hours at 110° C., and then add another 25.3 mmol of KMnO₄ with 10 ml of water. Stir the mixture at 110° C. over night. Cool to room temperature, and filter through celite pad. Concentrate the filtrate under vacuum, dilute with water, and wash the aqueous solution with EtOAc. Neutralize the aqueous solution with 2 N HCl and collect the precipitate to give 2-nitro-4(3-trifluoromethyl-pyridin-2-yl)-benzoic acid.

4. 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide

Reflux a mixture of 2-amino-4(3-trifluoromethyl-pyridin-2-yl)-benzoic acid (25 g) with SOCl₂ (50 ml) for 4 hours and concentrate. Dissolve the residue in dichloromethane (DCM), cool with ice-water bath, pass NH₃ gas through the solution for 30 minutes, and stir for 15 minutes at room temperature. Concentrate and wash with water to give 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide.

5. 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide

Hydrogenate 2-nitro-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (1.0 g, 0.0032 mol) with 50 psi of H₂ and 100 mg of 10% Pd/C in ethanol. After 16 hours, filter the mixture through celite and concentrate under reduced pressure to give 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide as a solid.

6. 2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-3H-quinazolin-4-one

Heat a solution of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (100 mg, 0.356 mmol) in 2-chloro-1,1,1-trimethoxyethane (bp 138° C.) at 130° C. for 4 hours. Concentrate the mixture under reduced pressure to give 2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-3H-quinazolin-4-one as an oil which crystallizes on standing.

7. 4-chloro-2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline

Reflux a mixture of 2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-3H-quinazolin-4-one (obtained from the reaction above) and POCl₃ for 16 hours. Cool the mixture and concentrate under reduced pressure. Partition the residue between EtOAc and saturated NaHCO₃ solution. Wash the EtOAc portion with additional NaHCO₃ and then dry (Na₂SO₄) and concentrate under reduced pressure. Filter the brown residue through 2 inches of silica gel (1:1 EtOAc/hexanes eluent) and concentrate under reduced pressure to give 4-chloro-2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline.

8. [2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoro methyl-phenyl)-amine

Heat a mixture of 4-chloro-2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline (42 mg, 0.117 mmol) and 4-trifluoromethyl-aniline (19 mg, 0.117 mmol) in isopropyl alcohol (1 mL) at 75° C. for 4 hours. Cool the mixture and wash the precipitate with isopropyl alcohol followed by ether to give [2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine as the mono-HCl salt.

9. [2-Isopropoxymethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

To a suspension of [2-chloromethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine hydrochloride (1.9 g, 0.0037 mol) in dry isopropanol (100 mL), add 20 equivalents of NaO-i-Pr (prepared from Na and isopropanol). Stir the pale yellow mixture at 60° C. for 5 hours, cool and evaporate the solvent under reduced pressure. Partition the residue between ethyl acetate and water and wash the organic layer with water (1×). Dry the organic layer (Na₂SO₄) and concentrate to give [2-isopropoxymethyl-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine as a foam.

B. 2-[4-(4-Trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-ethanol (compound 702) 1. 3-Benzyloxy-propionic acid

Add sodium hydride (2.22 g, 60% dispersion in mineral oil, 55.4 mmol) in small portions to a cold (0° C.) solution of benzyl alcohol (4.0 g, 37 mmol) in toluene (100 mL). Add ethyl 3-bromopropionate (8.0 g, 44 mmol) dropwise to the mixture, allow the resulting solution to warm to room temperature and stir for 1 hour. Quench the reaction with the addition of water until all bubbling ceases. Dilute the mixture with ethyl acetate (100 mL) and extract with water (100 mL) and brine (100 mL). Dry the organic extract over Na₂SO₄ and remove the solvent under reduced pressure to yield the crude ester as a clear oil. Dissolve the oil in methanol (20 mL) and 6 N NaOH (20 mL), stir for 1 hour, concentrate the mixture (˜20 mL) and dilute with water (20 mL). Extract the aqueous mixture once with CH₂Cl₂ (40 mL). Acidify the aqueous phase with conc. HCl, extract with EtOAc (3×50 mL), and dry the combined EtOAc extracts over Na₂SO₄. Remove the solvent under reduced pressure to yield the title compound as a clear oil (2.28 g, 34.0%) that solidifies upon standing.

2. 2-(2-Benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-3H-quinazolin-4-one

Cool a solution of 3-benzyloxy-propionic acid (1.66 g, 9.19 mmol) in hexanes (40 mL) to 0° C. and add oxalyl chloride (3.50 g, 27.6 mmol) dropwise. After the addition is completed, add DMF (2 drops) and stir the resulting mixture for 1 hour. Remove the solvent under reduced pressure and dissolve the crude acid chloride in dry THF (20 mL). In a separate flask, dissolve 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (2.35 g, 8.37 mmol) in dry THF (40 mL) and pyridine (0.727 g, 9.19 mmol) and cool to 0° C. Add the solution containing the crude acid chloride dropwise to the second solution. Allow the mixture to warm to room temperature and stir for 1 hour. Add a solution of 10% NaOH_((aq)) (20 mL) to the mixture and stir the solution for 1 hour. Concentrate the mixture (˜20 mL), dilute with water (20 mL), and acidify with conc. HCl. Extract the resulting solution with EtOAC (3×50 mL). Wash the combined organic extracts with brine and dry over Na₂SO₄. Remove the solvent under reduced pressure to yield the title compound as a white solid (3.24 g, 82.9%).

3. 2-(2-Benzyloxy-ethyl)4-chloro-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazoline

Dissolve 2-(2-Benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-3H-quinazolin-4-one (3.24 g, 7.62 mmol) in CHCl₃ (40 mL) and 2,6-lutidine (2.45 g, 22.9 mmol). Add phosphorous oxycloride (1.77 mL, 19.0 mmol) dropwise and heat the resulting solution to reflux for 18 hours. Cool the solution and remove the solvent under reduced pressure. Partition the crude residue between EtOAc (200 mL) and saturated NaHCO_(3 (aq)) (200 mL). Remove the organic phase and extract the aqueous phase with EtOAc (200 mL). Combine the two organic extracts, wash with brine (200 mL), and dry over Na₂SO₄. Remove the solvent to yield the title compound as a light brown solid (2.47 g, 73.1%).

4. [2-(2-Benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Dissolve 2-(2-Benzyloxy-ethyl)-4-chloro-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazoline (2.47 g, 5.57 mmol) in a solution of acetonitrile (50 mL) and 4-trifluoromethyl-aniline (0.986 g, 6.12 mmol). Heat the mixture to 80° C. for 2 hours. A white precipitate forms. Cool the solution in an ice bath and add diethyl ether (25 mL). Filter off the white precipitate and dry in a vacuum oven to yield the title compound as the mono-hydrochloride salt (2.96 g, 87.8%).

5. 2-[4-(4-Trifluoromethyl-phenylamino)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-2-yl]-ethanol

Dissolve [2-(2-Benzyloxy-ethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-4-(4-trifluoromethyl-phenyl)-amine hydrochloride (2.96 g, 4.89 mmol) in MeOH (150 mL) and add 10% Pd/C (200 mg). Hydrogenate the mixture at 50 p.s.i. at 60° C. for 8 hours. Quickly filter the mixture through Celite and wash the Celite filter cake with hot MeOH (200 mL). Remove the solvent under reduced pressure to yield the mono-hydrochloride salt of title compound as a white solid (1.75 g, 69.5%). Mass Spec. 478.1.

C. [2-(2-methoxy-ethyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine (compound 703) 1. 2-(2-methoxy-ethyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol

To a solution of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (3.56 mmol) and pyridine (3.91 mmol) in THF (20 ml), add 4-methoxy-butyryl chloride (3.91 mmol). Stir the mixture 20 minutes at room temperature, add 20 ml of 20% NaOH, stir for 60 minutes at 50° C. Concentrate, add water, filter, acidify to pH=6, collect the precipitate to obtain 2-(3-benzyloxy-propyl)7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

2. 2-(2-methoxy-ethyl)-4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline

Using procedures analogous to those already described, 2-(2-methoxy-ethyl)-4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline is prepared from 2-(2-methoxy-ethyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

3. [2-(2-methoxy-ethyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Using procedures analogous to those already described, [2-(2-methoxy-ethyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine is prepared from 2-(2-methoxy-ethyl)-4-chloro-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazoline. Mass Spec. 492.1.

D. 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazolin-2-yl]-propan-1-ol (compound 704) 1. 2-(3-benzyloxy-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol

To a solution of 2-amino-4-(3-trifluoromethyl-pyridin-2-yl)-benzamide (3.56 mmol) and pyridine (3.91 mmol) in THF (20 ml) add 4-benzyloxy-butyryl chloride (3.91 mmol). Stir the mixture 20 minutes at room temperature, add 20 ml of 20% NaOH, stir for 60 minutes at 50° C. Concentrate, add water, filter, acidify to pH=6, collect the precipitate to obtain 2-(3-benzyloxy-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

2. 2-(3-benzyloxy-propyl)-4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline

Using procedures analogous to those already described 2-(3-benzyloxy-propyl)-4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline can be prepared from 2-(3-benzyloxy-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-ol.

3. [2-(3-benzyloxy-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Using procedures analogous to those already described, [2-(3-benzyloxy-propyl)-7-(3-trifluoromethyl-pyridin-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine is prepared from 2-(3-benzyloxy-propyl)-4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline.

4. 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazolin-2-yl]-propan-1-ol

Hydrogenate the mixture of 2-(3-benzyloxy-propyl)-4-chloro-7-(3-trifluoromethyl-pyridin-2-yl)-quinazoline (0.5 mmol) and 10% Pd—C in EtOH (100 ml) at 50 psi for 30 hours. Filter, concentrate, and chromatograph to give 3-[4-(4-trifluoromethyl-phenylamino)-7-(3-trifluoro-methyl-pyridin-2-yl)-quinazolin-2-yl]-propan-1-ol. Mass Spec. 492.1.

E. 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (compound 705) 1. 6′-Methoxy-3-trifluoromethyl-[2,3′]bipyridinyl

Heat a mixture of 2-chloro-3-trifluoromethylpyridine (37 g, 0.2 mol), 2-methoxypyridine-5-boronic acid (32 g, 0.21 mol), tetrakis(triphenylphosphine)palladium(0) (9 g, 7 mmol) and 2M potassium carbonate (150 mL) in toluene (500 mL) under a nitrogen atmosphere at 90° C. for 8 hours. Cool the reaction mixture and separate the layers. Extract the aqueous layer with ethyl acetate (2×250 mL) and wash the combined organics with 4M sodium hydroxide (250 mL), water (250 mL), and brine (250 mL). Dry (MgSO₄) and concentrate under reduced pressure. Purify the resulting oil by flash chromatography on silica gel (50% ether/50% hexane) to give the title compound (48.2 g, 95%) as a colorless oil.

2. 3-Trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one

Heat 6′-Methoxy-3-trifluoromethyl-[2,3′]bipyridinyl (41 g, 0.16 mol) in 30% HBr/AcOH (100 mL) to reflux for 1 hour. Cool the mixture, filter and wash the precipitate with ether (100 mL). Transfer the precipitate into 10M sodium hydroxide (500 mL) and stir for 1 hour. Treat the solution with hydrochloric acid until the solution is pH 7. Collect the white solid by filtration and air dry to give the title compound (36 g, 93%) as a white solid.

3. 5′-Nitro-3-trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one

To a solution of 3-trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one (25 g, 0.1 mol) in concentrated sulfuric acid (100 mL) at 0° C., add dropwise a solution of fuming nitric acid (35 mL) and concentrated sulfuric acid (10 mL). Heat the reaction mixture to 70° C. for 1 hour, cool and pour onto ice (500 mL). Filter the mixture and treat the filtrate with 10 M sodium hydroxide until the solution is at pH 4-5. Collect the precipitate by filtration and air dry to give the title compound (26.2 g, 92%) as a white solid.

4. 6′-Chloro-5′-nitro-3-trifluoromethyl-[2,3′]bipyridinyl

Heat a solution of 5′-nitro-3-trifluoromethyl-1′H-[2,3′]bipyridinyl-6′-one (25 g, 0.088 mol), thionyl chloride (300 mL) and DMF (3 mL) to reflux for 4 hours. Remove the volatiles by rotary evaporation and partition the residue between ethyl acetate (350 mL) and saturated sodium bicarbonate solution (250 mL). Extract the aqueous layer with further ethyl acetate (250 mL) and wash the combined organics with brine (250 mL). Dry (MgSO₄) and concentrate under reduced pressure to give the title compound (25 g, 93%) as a yellow oil.

5. 6′-Chloro-3-trifluoromethyl-[2,3′]bipyridinyl-5′-ylamine

To a solution of 6′-chloro-5′-nitro-3-trifluoromethyl-[2,3′]bipyridinyl (25 g, 0.082 mol) and calcium chloride (11 g, 0.1 mol) in ethanol (300 mL) and water (50 mL), add iron powder (45 g, 0.82 mol). Heat the solution to reflux for 1.5 hours, cool and filter through Celite. Concentrate the mixture under reduced pressure, re-dissolve in ethyl acetate (300 mL) and wash with brine (200 mL). Concentrate the solution under reduced pressure and purify by flash chromatography on silica gel (50% ether/50% hexane) to give the title compound (19 g, 85%) as a pale yellow solid.

6. 3-Amino-5-[3-(trifluoromethyl)(2-pyridyl)]pyridine-2-carboxamide

Heat a solution of 6′-chloro-3-trifluoromethyl-[2,3′]bipyridinyl-5′-ylamine (25 g, 0.091 mol), zinc cyanide (6.75 g, 0.058 mol), tris[dibenzylidineacetone]di-palladium (pd₂(dba)₃; 2.63 g, 2.86 mmol), and 1,1′-bis(diphenylphosphino)ferrocene (DPPF; 3.16 g, 5.72 mmol) in DMF (250 mL) and water (2.5 mL), under a nitrogen atmosphere, at 120° C. for 1 hour. Add water (30 mL) and heat the solution at 120° C. for a further 4 hours to complete the hydrolysis. Cool the reaction to 0° C. and add a solution of saturated ammonium chloride (200 ml), water (200 mL) and concentrated ammonium hydroxide (50 mL). After stirring at 0° C. for 1 hour, filter the yellow precipitate, and wash with water (200 mL) and a 1:1 mixture of ether-hexane (200 mL). Air dry the solid, and then dry in a vacuum oven to give (23 g, 90%) of the title compound.

7. 2-(Chloromethyl)-7-[3-(trifluoromethyl)(2-pyridyl)]-3-hydropyridino[3,2-d]pyrimidin-4-one

Heat a solution of 3-amino-5-[3-(trifluoromethyl)(2-pyridyl)]pyridine-2-carboxamide (23 g, 81.5 mmol) and 2-chloro1,1,1-trimethoxyethane (250 mL) at 130° C. for 1 hour. Remove the volatiles by evaporation and triturate the solid (50% ether/50% hexane) to give the title compound as a light brown solid (21 g, 76%).

8. 4-Chloro-2-chloromethyl-7-(3-chloro-pyridin-2-yl)-pyrido[3,2-d]pyrimidine

Heat a solution of 2-(chloromethyl)-7-[3-(trifluoromethyl)(2-pyridyl)]-3-hydropyridino[3,2-d]pyrimidin-4-one (2.49 g, 7.31 mmol), phosphorous oxychloride (10 mL), 2,6-lutidine (2.13 mL, 18.3 mmol) and toluene to reflux for 8 hours. Remove the solvent and partition the crude residue between EtOAc (150 mL) and H₂O (150 mL). Remove the organic phase and extract the aqueous phase with EtOAc (150 mL). Combine the organic extractions, wash with saturated NaHCO₃(aq) (150 mL) and brine (150 mL), and dry over Na₂SO₄. Remove the solvent to yield the title compound as a light brown solid (2.30 g, 87.6%).

9. [2-(2-Chloromethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Dissolve 4-Chloro-2-chloro-methyl-7-(3-chloro-pyridin-2-yl)-pyrido[3,2-d]pyrimidine (2.30 g, 6.40 mmol) in a solution of acetonitrile (20 mL) and 4-trifluoromethyl aniline (1.13 g, 7.04 mmol). Heat the mixture at 80° C. for 18 hours. Cool the mixture to 0° C. and dilute with diethyl ether (20 mL). The mono-hydrochloride salt of the title compound forms a light brown precipitate (2.85 g 85.6%), which is removed by filtration and dried in a vacuum oven.

10. 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Treat [2-(2-Chloromethyl)-7-(3-trifluoromethyl-pyridiny-2-yl)-quinazolin-4-yl]-(4-trifluoromethyl-phenyl)-amine with NaOMe as described in Example 1.A-9 above. This affords 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine as a solid. Mass Spec. 479.1.

F. 7-(3-methyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (compound 706) 1. 5-Bromo-3-nitropyridine-2-carbonitrile

Heat a solution of 2-amino-5-bromo-3-nitropyridine (2.18 g, 10 mmol), cuprous cyanide (1.33 g, 15 mmol) and tert-butylnitrite (2.0 mL, 15 mmol) in acetonitrile (50 mL) at 60° C. for 2 hours. Cool the solution and partitioned between ethyl acetate (100 mL) and saturated aqueous NaHCO₃ (100 mL). Extract the aqueous layer with ethyl acetate (2×50 mL), wash with water (100 mL) and brine (100 mL), dry (MgSO₄) and evaporate. Purify the solid by flash chromatography on silica gel (25% ether/75% hexane) to give the title compound as a pale yellow solid (934 mg, 41%).

4. 5-(3-Methyl(2-pyridyl))-3-nitropyridine-2-carbonitrile

Heat a solution of 5-bromo-3-nitropyridine-2-carbonitrile (228 mg, 1.0 mmol), tetrakis(triphenylphosphine)palladium(0) (15 mg), 3-methyl-2-pyridylzinc bromide (0.5 M in THF, 3 mL, 1.5 mmol) in THF (5 mL) at 60° C. for 2 hours. Cool the solution and partition between ethyl acetate (10 mL) and saturated aqueous NaHCO₃ (10 mL). Extract the aqueous layer with ethyl acetate (2×15 mL), wash with water (10 mL) and brine (10 mL), dry (MgSO₄) and evaporate to give the title compound as a pale yellow solid (211 mg, 88%).

5. 3-Amino-5-(3-methyl(2-pyridyl))pyridine-2-carboxamide

Heat a solution of 5-(3-methyl(2-pyridyl))-3-nitropyridine-2-carbonitrile (1 g, 4.1 mmol), iron (2.3 g, 40 mmol) and calcium chloride (560 mg, 5 mmol) in ethanol (15 mL) and water (4 mL) to reflux for 1 hour. Cool the mixture, filter through Celite and wash with ethyl acetate. Evaporate the filtrate and re-dissolve the residue in ethyl acetate. Wash with water and brine, dry (MgSO₄) and evaporate to give the title compound as a pale yellow solid (880 mg, 94%).

4. 7-(3-methyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine

The title compound is prepared from 5′-amino-3-methyl-[2,3′]bipyridinyl-6′-carboxylic acid amide using procedures analogous to those described in examples A, B, D, E, G and H.

G. 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (compound 707) 1. 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-3H-pyrido[3,2-d]pyrimidin-4-one

Treat a solution of 3-amino-5-[3-(chloro-pyridin-2-yl)]pyridine-2-carboxamide (340 mg, 1.21 mmol) in THF (5 mL) and pyridine (0.11 mL) with methoxy-acetyl chloride (0.11 mL, 144 mg, 1.33 mmol). Stir the mixture for 3 hours at room temperature. Then, add 5 N NaOH (10 mL) and stir the solution for an additional 18 hours. Concentrate the solution (˜5 mL) and acidify with conc. HCl. Extract the aqueous mixture with EtOAc (3×25 mL), and dry the combined organic extracts over Na₂SO₄. Remove the solvent under reduced pressure to yield the title compound as a white solid.

2. 4-Chloro-7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidine

Dissolve 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-3H-pyrido[3,2-d]pyrimidin-4-one (276 mg, 0.822 mmol) in CHCl₃ (25 mL) and 2,6-lutidine (294 mg, 2.74 mmol). Add phosphorous oxycloride (0.255 mL, 2.74 mmol) dropwise and heat the resulting solution to reflux for 24 hours. Cool the solution and remove the solvent under reduced pressure. Partition the crude residue between EtOAc (50 mL) and saturated NaHCO_(3 (aq)) (50 mL). Remove the organic phase and extract the aqueous phase with additional EtOAc (50 mL). Combine the two organic extracts, wash with brine (100 mL), and dry over Na₂SO₄. Remove the solvent to yield the title compound as a light brown solid.

3. 7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Dissolve 4-Chloro-7-(3-trifluoromethyl-pyridin-2-yl)-2-methoxymethyl-pyrido[3,2-d]pyrimidine (30 mg, 0.0934 mmol) into a solution of acetonitrile (3 mL) and 4-trifluoromethyl-aniline (18.0 mg, 0.112 mmol). Heat the mixture to 80° C. for 16 hours. Cool the reaction mixture in an ice bath and add diethyl ether (3 mL). Filter off the off-white precipitate and dry in a vacuum oven to yield the title compound as the mono-hydrochloride salt. Mass Spec. 479.1.

H. [7-(3-Chloro-pyridin-2-yl)-2-methoxymethyl-pyrido[2,3-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine (compound 708) 1. 2-Acetyl-3-chloropyridine

Dissolve 3-chloro-2-cyanopyridine (10.0 g, 0.072 mol, Chem. Pharm. Bull. (1985) 33:565-571) in anhydrous THF (200 mL) under N₂ atmosphere and cool in an ice bath. Add drop wise 3.0 M MeMgI in diethyl ether (48 ml, 0.14 mol) to the reaction mixture and stir in an ice bath for 2 hours. Pour the reaction mixture over ice cold water, acidify the mixture with 2.0 N aq. HCl to pH 2 to 3. Extract the reaction mixture with EtOAc (3×100 mL) and dry over anhydrous MgSO₄. Filter, concentrate under vacuum and then filter through a pad of silica gel using 20% ethyl acetate/hexane as eluent. Removal of solvent under reduced pressure gives pure 2-acetyl-3-chloropyridine as oil.

2. 1-(3-Chloro-pyridin-2-yl)-3-dimethylaminopropenone

Heat 2-acetyl-3-chloropyridine (0.77 g, 5.0 mmol) with N,N-dimethylformamide dimethylacetal (3.0 g) at 105° C. for 20 hours. Concentrate under reduced pressure to give 1-(3-chloro-pyridin-2-yl)-3-dimethylaminopropenone as oil.

3. 2-Amino-4-(3-chloro-pyridin-2-yl)-benzonitrile

Heat a solution of 1-(3-Chloro-pyridin-2-yl)-3-dimethylaminopropenone (1.05 g, 5 mmol), 3-amino-3-methoxy-acrylonitrile hydrochloride (1.35 g, 10 mmol) and ammonium acetate (2.2 g, 15.0 mmol) in ethanol (25 mL) at reflux for 20 hours. Cool the mixture and concentrate under reduced pressure to give dark oil. Dissolve the residue in EtOAc/water (100 mL). Extract the aqueous solution with EtOAc, wash the EtOAc with brine, dry (MgSO₄) and concentrate under reduced pressure to give 2-amino-4-(3-chloro-pyridin-2-yl)-benzonitrile as a brown solid.

4. 6-Amino-3′-chloro-[2,2′]bipyridinyl-5-carboxylic acid amide

Cool concentrated sulfuric acid (10 mL) in an ice bath under nitrogen atmosphere. Add in portions 2-amino-4-(3-chloro-pyridin-2-yl)-benzonitrile (1.0 g, 4.3 mmol) over a period of 15 minutes. Stir at room temperature overnight. Pour the reaction mixture over ice, adjust the pH to 10 using 10 N aq. NaOH, filter the solid, wash the solid with water and dry under vacuum to give 6-amino-3′-chloro-[2,2′]bipyridinyl-5-carboxylic acid amide as a yellow solid.

5. 7-(3-Chloro-pyridin-2-yl)-2-methoxymethyl-3H-pyrido[2,3-d]pyrimidin-4-one

Dissolve 6-amino-3′-chloro-[2,2′]bipyridinyl-5-carboxylic acid amide (0.5 g, 2.02 mmol) in anhydrous THF (10 mL) under N₂ atmosphere. Add drop wise pyridine (0.36 g, 4.04 mmol) and methoxyacetyl chloride (0.48 g, 4.04 mmol) to the reaction mixture and stir at room temperature overnight. Add 10% aq. NaOH (10 mL) and reflux for 4 hours. Concentrate in vacuum, adjust the pH to 6.0 using AcOH, collect the solid by filtration and dry under vacuum to give 7-(3-chloro-pyridin-2-yl)-2-methoxymethyl-3H-pyrido[2,3-d]pyrimidin-4-one as a white solid.

6. 4-Chloro-7-(3-chloro-pyridin-2-yl)-2-methoxymethyl-pyrido[2,3-d]pyrimidine

Reflux a mixture of 7-(3-chloro-pyridin-2-yl)-2-methoxymethyl-3H-pyrido[2,3-d]pyrimidin-4-one (0.25 g), 2,6-lutidine (0.44 g), and POCl₃ (0.51 g) in CHCl₃ (5 mL) for 20 hours. Cool the mixture and concentrate under reduced pressure. Partition the residue between EtOAc and saturated NaHCO₃ solution. Wash the EtOAc portion with additional NaHCO₃ and then dry (Na₂SO₄) and concentrate under reduced pressure. Filter the brown residue through 2 inches of silica gel (1:1 EtOAc/hexanes eluent) and concentrate under reduced pressure to give 4-chloro-7-(3-chloro-pyridin-2-yl)-2-methoxymethyl-pyrido[2,3-d]pyrimidine.

7. [7-(3-Chloro-pyridin-2-yl)-2-methoxymethyl-pyrido[2,3-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine

Heat a mixture of 4-chloro-7-(3-chloro-pyridin-2-yl)-2-methoxymethyl-pyrido[2,3-d]pyrimidine (0.1 mmol) and 4-trifluoromethyl-aniline (16.1 mg, 0.1 mmol) in AcCN (1 mL) at 80° C. for 24 hours. Cool the mixture and wash the precipitate with ether to give [7-(3-chloro-pyridin-2-yl)-2-methoxymethyl-pyrido[2,3-d]pyrimidin-4-yl]-(4-trifluoromethyl-phenyl)-amine as the mono-HCl salt. Mass Spec. 445.1.

I. [2-Methoxymethyl-7-(3-methylpyridin-2-yl)-quinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (compound 709) 1. 7-bromo-2-methoxymethylquinazolin-4-yl)-(4-trifluoromethylphenyl)-amine

Heat a mixture of 7-bromo-2-chloromethylquinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (from Example C, 200 mg, 0.48 mmol), 4.4M sodium methoxide in methanol (2.4 mL), and methanol (1 mL) to 60° C. for 4 hours. Cool to room temperature and evaporate the mixture. Dilute with EtOAc (10 mL) and wash 2× with water (10 mL each). Dry the organic layer (Na₂SO₄) and evaporate. Purify by preparative TLC (3:1 hexanes:EtOAc) to obtain 2-methoxymethyl-7-pyridin-4-yl-quinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (225 mg) as a yellow solid.

2. [2-Methoxymethyl-7-(3-methylpyridin-2-yl)-quinazolin-4-yl)-(4-trifluoromethyl phenyl)-amine

Heat a mixture of 2-methoxymethyl-7-pyridin-4-yl-quinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (100 mg, 0.243 mmol), 3-methyl-2-pyridylzinc bromide (1 mL of a 0.5M THF solution), tetrakis(triphenylphosphinepalladium(0) (50 mg, 0.043 mmol) in 1,2-dimethoxymethane (5 mL) for 3 hours at 80° C. under nitrogen. Cool to room temperature and dilute with EtOAc (10 mL). Wash with water (2×10 mL) and dry the organic layer (Na₂SO₄) and evaporate. Purify by preparative TLC to obtain [2-methoxymethyl-7-(3-methylpyridin-2-yl)-quinazolin-4-yl)-(4-trifluoromethylphenyl)-amine (38 mg) as an off-white solid.

J. Additional Representative Substituted 2-Hydroxyalkyl-Quinazolin-4-ylamine Analogues

Compounds listed in Table VII were prepared using the above methods, with readily apparent modifications. TABLE VII Representative Substituted 2-Hydroxyalkyl-quinazolin-4-ylamine Analogues Compound Name MS 710.

(1-Methanesulfonyl-2,3-dihydro-1H- indol-5-yl)-[2-methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 529.1 711.

(2,6-Dimethyl-morpholin-4-yl)-(1-{4- [2-methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3- d]pyrimidin-4-ylamino]-phenyl}- cyclobutyl)-methanone 712.

(4-Cyclohexyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-amine 493.2 713.

(4-Cyclopentyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 714.

(4-Cyclopropyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 450.2 715.

(4-Ethyl-phenyl)-[2-methoxymethyl- 7-(3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-amine 439.2 716.

(4-Isopropyl-phenyl)-[2-(2-methoxy- ethyl)-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-amine 466.2 717.

(4-Isopropyl-phenyl)-[2-(tetrahydro- pyran-4-yloxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 522.2 718.

(4-Isopropyl-phenyl)-[2- methoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 399.2 719.

(4-Isopropyl-phenyl)-[2- methoxymethyl-7-(3-methyl-pyridin- 2-yl)-quinazolin-4yl]-amine 398.2 720.

(4-Isopropyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-amine 453.2 721.

(4-Isopropyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 452.2 722.

(4-Isopropyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 723.

(4-Isopropyl-phenyl)-[7-(3-methyl- pyridin-2-yl)-2-(tetrahydro-pyran-4- yloxymethyl)-quinazolin-4-yl]-amine 468.3 724.

(4-Methanesulfonyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 488.1 725.

(4-Methanesulfonyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 726.

(4-sec-Butyl-phenyl)-[2- methoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 413.2 727.

(4-sec-Butyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 728.

(4-sec-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2-methoxy- ethoxymethyl)-pyrido[2,3- d]pyrimidin-4-yl]-amine 477.2 729.

(4-sec-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-methoxymethyl- pyrido[2,3-d]pyrimidin-4-yl]-amine 433.2 730.

(4-tert-Butyl-phenyl)-[2-(2-methoxy- ethyl)-7-(3-trifluoromethyl-pyridin-2- yl)-quinazolin-4-yl]-amine 480.2 731.

(4-tert-Butyl-phenyl)-[2-(3- diethylamino-1-methyl- propoxymethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 732.

(4-tert-Butyl-phenyl)-[2-(3- diethylamino-1-methyl- propoxymethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 579.3 733.

(4-tert-Butyl-phenyl)-[2-(3- diethylamino-propoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 565.3 734.

(4-tert-Butyl-phenyl)-[2-(3- dimethylamino-propoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 537.3 735.

(4-tert-Butyl-phenyl)-[2-(3- morpholin-4-yl-propoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 579.3 736.

(4-tert-Butyl-phenyl)-[2-(4- dimethylamino-butoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 737.

(4-tert-Butyl-phenyl)-[2-(4- morpholin-4-yl-butoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 738.

(4-tert-Butyl-phenyl)-[2- isobutoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 739.

(4-tert-Butyl-phenyl)-[2- isobutoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 740.

(4-tert-Butyl-phenyl)-[2- methoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 413.2 741.

(4-tert-Butyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 4-yl]-amine 467.2 742.

(4-tert-Butyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 466.2 743.

(4-tert-Butyl-phenyl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 744.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-(2-methoxy- ethoxymethyl)-pyrido[2,3- d]pyrimidin-4-yl]-amine 745.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-ethoxymethyl- pyrido[2,3-d]pyrimidin-4-yl]-amine 746.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-ethoxymethyl- quinazolin-4-yl]-amine 446.2 747.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-methoxymethyl- pyrido[2,3-d]pyrimidin-4-yl]-amine 433.2 748.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-methoxymethyl- pyrido[3,2-d]pyrimidin-4-yl]-amine 433.2 749.

(4-tert-Butyl-phenyl)-[7-(3-chloro- pyridin-2-yl)-2-methoxymethyl- quinazolin-4-yl]-amine 432.2 750.

(6-tert-Butyl-pyridin-3-yl)-[2-(2- methoxy-ethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 481.2 751.

(6-tert-Butyl-pyridin-3-yl)-[2- isobutoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 752.

(6-tert-Butyl-pyridin-3-yl)-[2- isobutoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 753.

(6-tert-Butyl-pyridin-3-yl)-[2- methoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]- amine 754.

(6-tert-Butyl-pyridin-3-yl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-amine 467.2 755.

(6-tert-Butyl-pyridin-3-yl)-[2- methoxymethyl-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-amine 756.

(6-tert-Butyl-pyridin-3-yl)-[7-(3- chloro-pyridin-2-yl)-2-ethoxymethyl- quinazolin-4-yl]-amine 447.2 757.

(6-tert-Butyl-pyridin-3-yl)-[7-(3- chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin- 4-yl]-amine 758.

(6-tert-Butyl-pyridin-3-yl)-[7-(3- chloro-pyridin-2-yl)-2- methoxymethyl-quinazolin-4-yl]- amine 433.2 759.

(6-tert-Butyl-pyridin-3-yl)-[7-(3- chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-amine 760.

[2-(1-Methyl-piperidin-4- yloxymethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 562.2 761.

[2-(2-Diethylamino-ethoxymethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 564.2 762.

[2-(2-Dimethylamino-ethoxymethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 535.2 763.

[2-(2-Piperidin-1-yl-ethoxymethyl)-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 576.2 764.

[2-(3-Benzyloxy-propyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 582.2 765.

[2-(3-Benzyloxy-propyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 583.2 766.

[2-(3-Benzyloxy-propyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-tert-butyl-pyridin- 3-yl)-amine 571.3 767.

[2-(3-Diethylamino-propoxymethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 577.2 768.

[2-(3-Dimethylamino-2,2-dimethyl- propoxymethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 577.2 769.

[2-(3-Dimethylamino- propoxymethyl)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 549.2 770.

[2-(Pyridin-3-ylmethoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 556.1 771.

[2-(Pyridin-4-ylmethoxymethyl)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 556.1 772.

[2-(Tetrahydro-pyran-4-yloxymethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 548.2 773.

[2-(Tetrahydro-pyran-4-yloxymethyl)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 549.2 774.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(2,2,2-trifluoro-1- methyl-ethyl)-phenyl]-amine 582.2 775.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 554.2 776.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 555.1 777.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(5-trifluoromethyl- pyridin-2-yl)-amine 555.1 778.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethoxy- phenyl)-amine 570.1 779.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 618.1 780.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-methanesulfonyl- phenyl)-amine 564.1 781.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(2-methoxy-1,1- dimethyl-ethyl)-phenyl]-amine 572.2 782.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-tert-butyl-phenyl)- amine 542.2 783.

[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(1-methanesulfonyl- 2,3-dihydro-1H-indol-5-yl)-amine 605.2 784.

[2-Cyclopentyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 785.

[2-Cyclopropylmethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 786.

[2-Ethoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 412.2 787.

[2-Ethoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(4- isopropyl-phenyl)-amine 438.2 788.

[2-Ethoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 492.1 789.

[2-Ethoxymethyl-7-(3-methyl-pyridin- 2-yl)-quinazolin-4-yl]-(4-isopropyl- phenyl)-amine 790.

[2-Ethoxymethyl-7-(3-methyl-pyridin- 2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 791.

[2-Ethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl- phenyl)-amine 792.

[2-Ethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(6- trifluoromethyl- pyridin-3-yl)-amine 793.

[2-Ethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 794.

[2-Ethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 795.

[2-Ethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)- amine 796.

[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-isopropyl-phenyl)-amine 797.

[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)- amine 798.

[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(3-methyl-4-trifluoromethyl- phenyl)-amine 799.

[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethoxy-phenyl)- amine 800.

[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-[4-(2-methoxy-1,1-dimethyl- ethyl)-phenyl]-amine 801.

[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-methanesulfonyl-phenyl)- amine 802.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- isopropyl-phenyl)-amine 803.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 804.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 805.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(3- methyl-4-trifluoromethyl-phenyl)- amine 806.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 807.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethoxy-phenyl)-amine 808.

[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- methanesulfonyl-phenyl)-amine 809.

[2-Isopropoxymethyl-7-(3-methyl- pyridin-2-yl)-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 452.2 810.

[2-Isopropoxymethyl-7-(3-methyl- pyridin-2-yl)-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine 426.2 811.

[2-Isopropoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 812.

[2-Isopropoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 507.1 813.

[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)- amine 425.1 814.

[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(6-trifluoromethyl-pyridin-3-yl)- amine 815.

[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethanesulfonyl- phenyl)-amine 816.

[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethoxy-phenyl)- amine 817.

[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-yl]-(3-methyl-4-trifluoromethyl- phenyl)-amine 818.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-[4- (2,2,2-trifluoro-1-methyl-ethyl)- phenyl]-amine 819.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethyl-phenyl)-amine 820.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 821.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-[4- (morpholine-4-sulfonyl)-phenyl]- amine 822.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 823.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(3- methyl-4- trifluoromethyl-phenyl)-amine 824.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-yl]-(4- trifluoromethoxy-phenyl)-amine 825.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(6- trifluoromethyl-pyridin-3-yl)-amine 480.1 826.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-yl]-(4- morpholin-4-yl-phenyl)-amine 496.2 827.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 478.1 828.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 479.1 829.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 542.1 830.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-(5-trifluoromethyl- pyridin-2-yl)-amine 479.1 831.

[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 832.

[4-(2-Diethylamino-1,1-dimethyl- ethyl)-phenyl]-[2-methoxymethyl-7- (3-methyl-pyridin-2-yl)-pyrido[2,3- d]pyrimidin-4-yl]-amine 833.

[4-(2-Methoxy-1,1-dimethyl-ethyl)- phenyl]-[2-methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-yl]-amine 496.2 834.

[4-(2-Methoxy-1,1-dimethyl-ethyl)- phenyl]-[2-methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)-pyrido [3,2-d]pyrimidin-4-yl]-amine 497.2 835.

[4-(4-Isopropyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-methanol 438.2 836.

[4-(4-tert-Butyl-phenylamino)-7-(3- chloro-pyridin-2-yl)-quinazolin-2-yl]- methanol 418.2 837.

[4-(4-tert-Butyl-phenylamino)-7-(3- methyl-pyridin-2-yl)- pyrido[2,3d]pyrimidin-2-yl]-methanol 838.

[4-(4-tert-Butyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-methanol 452.2 839.

[4-(4-tert-Butyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-2-yl]- methanol 840.

[4-(4-Trifluoromethyl-phenylamino)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-methanol 464.1 841.

[4-(4-Trifluoromethyl-phenylamino)- 7-(3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-2-yl]- methanol 465.1 842.

[4-(4-Trifluoromethyl-phenylamino)- 7-(3-trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-2-yl]- methanol 843.

[4-(Morpholine-4-sulfonyl)-phenyl]- [2-(tetrahydro-pyran-4-yloxymethyl)- 7-(3-trifluoromethyl-pyridin- 2-yl)-quinazolin-4-yl]-amine 844.

[4-[4-(Piperidine-1-sulfonyl)- phenylamino]-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]- methanol 845.

[4-[4-(Piperidine-1-sulfonyl)- phenylamino]-7-(3-trifluoromethyl- pyridin-2-yl)-pyrido[3,2-d]pyrimidin- 2-yl]-methanol 846.

[7-(3-Chloro-pyridin-2-yl)-2-(2- methoxy-ethoxymethyl)-pyrido[2,3- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 847.

[7-(3-Chloro-pyridin-2-yl)-2-(2- methoxy-ethoxymethyl)-pyrido[2,3- d]pyrimidin-4-yl]-(4-isopropyl- phenyl)-amine 463.2 848.

[7-(3-Chloro-pyridin-2-yl)-2-(2- methoxy-ethyl)-pyrido[2,3- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 849.

[7-(3-Chloro-pyridin-2-yl)-2- (tetrahydro-pyran-4-yloxymethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 514.1 850.

[7-(3-Chloro-pyridin-2-yl)-2- (tetrahydro-pyran-4-yloxymethyl)- quinazolin-4-yl]-(4-isopropyl-phenyl)- amine 488.2 851.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-(4-isopropyl-phenyl)-amine 852.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethyl-phenyl)- amine 853.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-(4-trifluoromethanesulfonyl- phenyl)-amine 854.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-[4-(2,2,2-trifluoro-1-methyl- ethyl)-phenyl]-amine 855.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-(4-cyclopentyl-phenyl)-amine 856.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-(6-trifluoromethyl-pyridin- 3-yl)-amine 857.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-yl]-(3-methyl-4-trifluoromethyl- phenyl)-amine 858.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine 432.2 859.

[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 458.1 860.

[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 861.

[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(6-trifluoromethyl- pyridin-3-yl)-amine 862.

[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(3-methyl-4- trifluoromethyl-phenyl)-amine 863.

[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(4- trifluoromethoxy-phenyl)-amine 864.

[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(4- trifluoromethanesulfonyl-phenyl)- amine 865.

[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(4-methanesulfonyl- phenyl)-amine 866.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(4-isopropyl- phenyl)-amine 419.2 867.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-[4-(2-methoxy-1,1- dimethyl-ethyl)-phenyl]-amine 463.2 868.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(4- trifluoromethoxy-phenyl)-amine 869.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-yl]-(3-methyl-4- trifluoromethyl-phenyl)-amine 870.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[3,2- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 445.1 871.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[3,2- d]pyrimidin-4-yl]-(4-isopropyl- phenyl)-amine 419.2 872.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[3,2- d]pyrimidin-4-yl]-[4-(morpholine-4- sulfonyl)-phenyl]-amine 526.1 873.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-quinazolin-4-yl]-(4- isopropyl-phenyl)-amine 418.2 874.

[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-quinazolin-4-yl]-(4- trifluoromethyl-phenyl)-amine 444.1 875.

[7-(3-Chloro-pyridin-2-yl)-4-(4- isopropyl-phenylamino)-quinazolin-2- yl]-methanol 404.1 876.

[7-(3-Chloro-pyridin-2-yl)-4-(4- trifluoromethyl-phenylamino)- pyrido[3,2-d]pyrimidin-2-yl]- methanol 431.1 877.

[7-(3-Methyl-pyridin-2-yl)-2- (tetrahydro-furan-3-yl)-pyrido[2,3- d]pyrimidin-4-yl]-(4-trifluoromethyl- phenyl)-amine 878.

[7-(3-Methyl-pyridin-2-yl)-2- (tetrahydro-pyran-4-yloxymethyl)- quinazolin-4-yl]-(4-trifluoromethyl- phenyl)-amine 494.2 879.

[7-(3-Methyl-pyridin-2-yl)-4-(4- trifluoromethyl-phenylamino)- pyrido[2,3-d]pyrimidin-2-yl]- methanol 411.1 880.

[7-(3-Trifluoromethyl-pyridin-2-yl)-4- (6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-yl]-methanol 465.1 881.

1-{4-[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}- cyclobutanecarbonitrile 882.

1-{4-[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}- cyclobutanecarbonitrile 436.2 883.

1-{4-[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-ylamino]- phenyl}-ethanone 453.1 884.

1-{4-[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-ylamino]- phenyl}-butan-1-one 481.2 885.

1-{4-[7-(3-Chloro-pyridin-2-yl)-2- ethoxymethyl-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}- cyclobutanecarbonitrile 470.2 886.

1-Dimethylamino-3-[4-(4- trifluoromethyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-ylmethoxy]-propan-2-ol 887.

2-[4-(4-tert-Butyl-phenylamino)-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-2-methyl-propan-1-ol 888.

2-{4-[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]-phenyl}-2- methyl-propionitrile 553.2 889.

2-{4-[2-Ethoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-2-methyl-propionitrile 890.

2-{4-[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}-2-methyl- propionitrile 891.

2-{4-[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-2-methyl-propionitrile 892.

2-{4-[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}-2-methyl- propionitrile 424.2 893.

2-{4-[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]-phenyl}-2- methyl-propionitrile 477.2 894.

2-{4-[7-(3-Chloro-pyridin-2-yl)-2-(2- methoxy-ethoxymethyl)-pyrido[2,3- d]pyrimidin-4-ylamino]-phenyl}-2- methyl-propionitrile 488.2 895.

2-{4-[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-ylamino]-phenyl}-2- methyl-propionitrile 896.

2-{4-[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-ylamino]-phenyl}-2- methyl-propionitrile 444.1 897.

2-Methyl-2-[4-(4-trifluoromethyl- phenylamino)-7-(3-trifluoromethyl- pyridin-2-yl)-quinazolin-2-yl]-propan- 1-ol 898.

2-Methyl-2-{4-[7-(3-methyl-pyridin- 2-yl)-2-(tetrahydro-furan-3-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-propionitrile 899.

3-[4-(6-tert-Butyl-pyridin-3-ylamino)- 7-(3-trifluoromethyl-pyridin-2-yl)- quinazolin-2-yl]-propan-1-ol 481.2 900.

3-[7-(3-Trifluoromethyl-pyridin-2-yl)- 4-(6-trifluoromethyl-pyridin-3- ylamino)-quinazolin-2-yl]-propan-1-ol 493.1 901.

3-{4-[2-Isobutoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}-3-methyl-butan- 2-one 902.

3-{4-[2-Isobutoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-3-methyl-butan-2-one 903.

3-{4-[2-Methoxymethyl-7-(3-methyl- pyridin-2-yl)-pyrido[2,3-d]pyrimidin- 4-ylamino]-phenyl}-3-methyl-butan- 2-one 904.

3-{4-[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-3-methyl-butan-2-one 905.

3-{4-[7-(3-Chloro-pyridin-2-yl)-2- isobutoxymethyl-pyrido[2,3- d]pyrimidin-4-ylamino]-phenyl}-3- methyl-butan-2-one 906.

3-{4-[7-(3-Chloro-pyridin-2-yl)-2- methoxymethyl-pyrido[2,3- d]pyrimidin-4-ylamino]-phenyl}-3- methyl-butan-2-one 907.

4-[2-Benzyloxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]-N-tert-butyl- benzenesulfonamide 621.2 908.

4-[2-Methoxymethyl-7-(3- trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-ylamino]- benzonitrile 436.1 909.

N,N-Diethyl-2-{4-[2- isobutoxymethyl-7-(3-methyl-pyridin- 2-yl)-pyrido[2,3-d]pyrimidin-4- ylamino]-phenyl}-isobutyramide 910.

N,N-Diethyl-2-{4-[2-methoxymethyl- 7-(3-trifluoromethyl-pyridin-2-yl)- pyrido[2,3-d]pyrimidin-4-ylamino]- phenyl}-isobutyramide 911.

N-tert-Butyl-4-[2-hydroxymethyl-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]-N-methyl- benzenesulfonamide 912.

N-tert-Butyl-4-[2-hydroxymethyl-7- (3-trifluoromethyl-pyridin-2-yl)- pyrido[3,2-d]pyrimidin-4-ylamino]-N- methyl-benzenesulfonamide 913.

N-tert-Butyl-4-[2-methoxymethyl-7- (3-trifluoromethyl-pyridin-2-yl)- quinazolin-4-ylamino]- benzenesulfonamide 545.2

Example 4 VR1-Transfected Cells and Membrane Preparations

This Example illustrates the preparation of VR1-transfected cells and VR1-containing membrane preparations for use in capsaicin binding assays (Example 5).

A cDNA encoding full length human capsaicin receptor (SEQ ID NO:1, 2 or 3 of U.S. Pat. No. 6,482,611) was subcloned in the plasmid pBK-CMV (Stratagene, La Jolla, Calif.) for recombinant expression in mammalian cells.

Human embryonic kidney (HEK293) cells were transfected with the pBK-CMV expression construct encoding the full length human capsaicin receptor using standard methods. The transfected cells were selected for two weeks in media containing G418 (400 μg/ml) to obtain a pool of stably transfected cells. Independent clones were isolated from this pool by limiting dilution to obtain clonal stable cell lines for use in subsequent experiments.

For radioligand binding experiments, cells were seeded in T175 cell culture flasks in media without antibiotics and grown to approximately 90% confluency. The flasks were then washed with PBS and harvested in PBS containing 5 mM EDTA. The cells were pelleted by gentle centrifugation and stored at −80° C. until assayed.

Previously frozen cells were disrupted with the aid of a tissue homogenizer in ice-cold HEPES homogenization buffer (5 mM KCl 5, 5.8 mM NaCl, 0.75 mM CaCl₂, 2 mM MgCl₂, 320 mM sucrose, and 10 mM HEPES pH 7.4). Tissue homogenates were first centrifuged for 10 minutes at 1000×g (4° C.) to remove the nuclear fraction and debris, and then the supernatant from the first centrifugation is further centrifuged for 30 minutes at 35,000×g (4° C.) to obtain a partially purified membrane fraction. Membranes were resuspended in the HEPES homogenization buffer prior to the assay. An aliquot of this membrane homogenate is used to determine protein concentration via the Bradford method (BIO-RAD Protein Assay Kit, #500-0001, BIO-RAD, Hercules, Calif.).

Example 5 Capsaicin Receptor Binding Assay

This Example illustrates a representative assay of capsaicin receptor binding that may be used to determine the binding affinity of compounds for the capsaicin (VR1) receptor.

Binding studies with [³H] Resiniferatoxin (RTX) are carried out essentially as described by Szallasi and Blumberg (1992) J. Pharmacol. Exp. Ter. 262: 883-888. In this protocol, non-specific RTX binding is reduced by adding bovine alpha₁ acid glycoprotein (100 μg per tube) after the binding reaction has been terminated.

[³H] RTX (37 Ci/mmol) is synthesized by and obtained from the Chemical Synthesis and Analysis Laboratory, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, Md. [³H] RTX may also be obtained from commercial vendors (e.g., Amersham Pharmacia Biotech, Inc.; Piscataway, N.J.).

The membrane homogenate of Example 4 is centrifuged as before and resuspended to a protein concentration of 333 μg/ml in homogenization buffer. Binding assay mixtures are set up on ice and contained [³H]RTX (specific activity 2200 mCi/ml), 2 μl non-radioactive test compound, 0.25 mg/ml bovine serum albumin (Cohn fraction V), and 5×10⁴-1×10⁵ VR1-transfected cells. The final volume is adjusted to 500 μl (for competition binding assays) or 1,000 μl (for saturation binding assays) with the ice-cold HEPES homogenization buffer solution (pH 7.4) described above. Non-specific binding is defined as that occurring in the presence of 1 μM non-radioactive RTX (Alexis Corp.; San Diego, Calif.). For saturation binding, [³H]RTX is added in the concentration range of 7-1,000 μM, using 1 to 2 dilutions. Typically 11 concentration points are collected per saturation binding curve.

Competition binding assays are performed in the presence of 60 μM [³H]RTX and various concentrations of test compound. The binding reactions are initiated by transferring the assay mixtures into a 37° C. water bath and are terminated following a 60 minute incubation period by cooling the tubes on ice. Membrane-bound RTX is separated from free, as well as any alpha₁-acid glycoprotein-bound RTX, by filtration onto WALLAC glass fiber filters (PERKIN-ELMER, Gaithersburg, Md.) which were pre-soaked with 1.0% PEI (polyethyleneimine) for 2 hours prior to use. Filters are allowed to dry overnight then counted in a WALLAC 1205 BETA PLATE counter after addition of WALLAC BETA SCINT scintillation fluid.

Equilibrium binding parameters are determined by fitting the allosteric Hill equation to the measured values with the aid of the computer program FIT P (Biosoft, Ferguson, Mo.) as described by Szallasi, et al. (1993) J. Pharmacol. Exp. Ther. 266:678-683. Compounds provided herein generally exhibit K_(i) values for capsaicin receptor of less than 4 μM, preferably less than 1 μM, 100 nM, 50 nM, 25 nM, 10 nM or 1 nM in this assay.

Example 6 Calcium Mobilization Assay

This Example illustrates a representative calcium mobilization assay for use in monitoring the response of cells expressing capsaicin receptor to capsaicin and other vanilloid ligands of the capsaicin receptor, as well as for evaluating test compounds for agonist and antagonist activity.

Cells transfected with expression plasmids (as described in Example 4) and thereby expressing human capsaicin receptor are seeded and grown to 70-90% confluency in FALCON black-walled, clear-bottomed 96-well plates (#3904, BECTON-DICKINSON, Franklin Lakes, N.J.). The culture medium is emptied from the 96 well plates and FLUO-3 AM calcium sensitive dye (Molecular Probes, Eugene, Oreg.) is added to each well (dye solution: 1 mg FLUO-3 AM, 440 μL DMSO and 440 μl 20% pluronic acid in DMSO, diluted 1:250 in Krebs-Ringer HEPES (KRH) buffer (25 mM HEPES, 5 mM KCl, 0.96 mM NaH₂PO₄, 1 mM MgSO₄, 2 mM CaCl₂, 5 mM glucose, 1 mM probenecid, pH 7.4), 50 μl diluted solution per well). Plates are covered with aluminum foil and incubated at 37° C. for 1-2 hours in an environment containing 5% CO₂. After the incubation, the dye is emptied from the plates, and the cells are washed once with KRH buffer, and resuspended in KRH buffer.

Agonist (e.g., olvanil, capsaicin, or RTX)-induced calcium mobilization is monitored using either FLUOROSKAN ASCENT (Labsystems, Franklin, Mass.) or FLIPR (fluorometric imaging plate reader system, Molecular Devices, Sunnyvale, Calif.) instruments. Varying concentrations of the antagonists ruthenium red or capsazepine (RBI; Natick, Mass.) are added to cells concurrently with agonist (e.g., 25-50 nM capsaicin). For agonist-induced calcium responses, data obtained between 30 and 60 seconds after agonist application are used to generate the IC₅₀ values. KALEIDAGRAPH software (Synergy Software, Reading, Pa.) is used to fit the data to the equation: y=a*(1/(1+(b/x)^(c))) to determine the IC₅₀ for the response. In this equation, y is the maximum fluorescence signal, x is the concentration of the agonist or antagonist, a is the E_(max), b corresponds to the IC₅₀ value and c is the Hill coefficient.

To measure the ability of a test compound to antagonize (inhibit) the response of cells expressing capsaicin receptors to capsaicin or other vanilloid agonist, the IC₅₀ of capsaicin is first determined. An additional 20 μl of KRH buffer and 1 μl DMSO is added to each well of cells, prepared as described above. 100 μl capsaicin in KRH buffer is automatically transferred by the FLIPR instrument to each well. An 8-point concentration response curve, with final capsaicin concentrations of 1 nM to 3 μM, is used to determine capsaicin IC₅₀.

Test compounds are dissolved in DMSO, diluted in 20 μl KRH buffer so that the final concentration of test compounds in the assay well is between 1 μM and 5 μM, and added to cells prepared as described above. The 96 well plates containing prepared cells and test compounds are incubated in the dark, at room temperature for 0.5 to 6 hours. It is important that the incubation not continue beyond 6 hours. Just prior to determining the fluorescence response, 100 μl capsaicin in KRH buffer at twice the IC₅₀ concentration determined from the concentration response curve is automatically added by the FLIPR instrument to each well of the 96 well plate for a final sample volume of 200 μl and a final capsaicin concentration equal to the EC₅₀. The final concentration of test compounds in the assay wells is between 1 μM and 5 μM. Typically cells exposed to one IC₅₀ of capsaicin exhibit a fluorescence response of about 10,000 Relative Fluorescence Units. Antagonists of the capsaicin receptor decrease this response by at least about 20%, preferably by at least about 50%, and most preferably by at least 80% as compared to matched control. The concentration of antagonist required to provide a 50% decrease is the IC₅₀ for the antagonist, and is preferably below 1 micromolar, 100 nanomolar, 10 nanomolar or 1 nanomolar.

The ability of a compound to act as an agonist of the capsaicin receptor is determined by measuring the fluorescence response of cells expressing capsaicin receptors, using the methods described above, in the absence of capsaicin, RTX, or other known capsaicin receptor agonists. Compounds that cause cells to exhibit fluorescence above background are capsaicin receptor agonists. Certain preferred compounds of the present invention are antagonists that are essentially free of agonist activity as demonstrated by the absence of detectable agonist activity in such an assay at compound concentrations below 4 nM, more preferably at concentrations below 10 μM and most preferably at concentrations less than or equal to 100 μM.

Example 7 Microsomal In Vitro Half-Life

This Example illustrates the evaluation of compound half-life values (t_(1/2) values) using a representative liver microsomal half-life assay.

Pooled human liver microsomes are obtained from XenoTech LLC, 3800 Cambridge St., Kansas City, Kans. 66103 (catalog # H0610). Such liver microsomes may also be obtained from In Vitro Technologies (Baltimore, Md.) or Tissue Transformation Technologies (Edison, N.J.). Six test reactions are prepared, each containing 25 μl microsomes, 5 μl of a 100 μM solution of test compound, and 399 μl 0.1 M phosphate buffer (19 mL 0.1 M NaH₂PO₄, 81 mL 0.1 M Na₂HPO₄, adjusted to pH 7.4 with H₃PO₄). A seventh reaction is prepared as a positive control containing 25 μl microsomes, 399 μl 0.1 M phosphate buffer, and 5 μl of a 100 μM solution of a compound with known metabolic properties (e.g., DIAZEPAM or CLOZAPINE). Reactions are preincubated at 39° C. for 10 minutes.

CoFactor Mixture is prepared by diluting 16.2 mg NADP and 45.4 mg Glucose-6-phosphate in 4 mL 100 mM MgCl₂. Glucose-6-phosphate dehydrogenase solution is prepared by diluting 214.3 μl glucose-6-phosphate dehydrogenase suspension (Boehringer-Manheim catalog no. 0737224, distributed by Roche Molecular Biochemicals, Indianapolis, Ind.) into 1285.7 μl distilled water. 71 μl Starting Reaction Mixture (3 mL CoFactor Mixture; 1.2 mL Glucose-6-phosphate dehydrogenase solution) is added to 5 of the 6 test reactions and to the positive control. 71 μl 100 mM MgCl₂ is added to the sixth test reaction, which is used as a negative control. At each time point (0, 1, 3, 5, and 10 minutes), 75 μl of each reaction mix is pipetted into a well of a 96-well deep-well plate containing 75 μl ice-cold acetonitrile. Samples are vortexed and centrifuged 10 minutes at 3500 rpm (Sorval T 6000D centrifuge, H1000B rotor). 75 μl of supernatant from each reaction is transferred to a well of a 96-well plate containing 150 μl of a 0.5 μM solution of a compound with a known LCMS profile (internal standard) per well. LCMS analysis of each sample is carried out and the amount of unmetabolized test compound is measured as AUC, compound concentration vs. time is plotted, and the t_(1/2) value of the test compound is extrapolated.

Preferred compounds of the present invention exhibit in vitro t_(1/2) values of greater than 10 minutes and less than 4 hours, preferably between 30 minutes and 1 hour, in human liver microsomes.

Example 8 MDCK Toxicity Assay

This Example illustrates the evaluation of compound toxicity using a Madin Darby canine kidney (MDCK) cell cytotoxicity assay.

1 μL of test compound is added to each well of a clear bottom 96-well plate (PACKARD, Meriden, Conn.) to give final concentration of compound in the assay of 10 micromolar, 100 micromolar or 200 micromolar. Solvent without test compound is added to control wells.

MDCK cells, ATCC no. CCL-34 (American Type Culture Collection, Manassas, Va.), are maintained in sterile conditions following the instructions in the ATCC production information sheet. Confluent MDCK cells are trypsinized, harvested, and diluted to a concentration of 0.1×10⁶ cells/ml with warm (37° C.) medium (VITACELL Minimum Essential Medium Eagle, ATCC catalog # 30-2003). 100 μL of diluted cells is added to each well, except for five standard curve control wells that contain 100 μL of warm medium without cells. The plate is then incubated at 37° C. under 95% O₂, 5% CO₂ for 2 hours with constant shaking. After incubation, 50 μL of mammalian cell lysis solution is added per well, the wells are covered with PACKARD TOPSEAL stickers, and plates are shaken at approximately 700 rpm on a suitable shaker for 2 minutes.

Compounds causing toxicity will decrease ATP production, relative to untreated cells. The PACKARD, (Meriden, Conn.) ATP-LITE-M Luminescent ATP detection kit, product no. 6016941, is generally used according to the manufacturer's instructions to measure ATP production in treated and untreated MDCK cells. PACKARD ATP LITE-M reagents are allowed to equilibrate to room temperature. Once equilibrated, the lyophilized substrate solution is reconstituted in 5.5 mls of substrate buffer solution (from kit). Lyophilized ATP standard solution is reconstituted in deionized water to give a 10 mM stock. For the five control wells, 10 μL of serially diluted PACKARD standard is added to each of the standard curve control wells to yield a final concentration in each subsequent well of 200 nM, 100 nM, 50 nM, 25 nM and 12.5 nM. PACKARD substrate solution (50 μL) is added to all wells, which are then covered, and the plates are shaken at approximately 700 rpm on a suitable shaker for 2 minutes. A white PACKARD sticker is attached to the bottom of each plate and samples are dark adapted by wrapping plates in foil and placing in the dark for 10 minutes. Luminescence is then measured at 22° C. using a luminescence counter (e.g., PACKARD TOPCOUNT Microplate Scintillation and Luminescence Counter or TECAN SPECTRAFLUOR PLUS), and ATP levels calculated from the standard curve. ATP levels in cells treated with test compound(s) are compared to the levels determined for untreated cells. Cells treated with 10 μM of a preferred test compound exhibit ATP levels that are at least 80%, preferably at least 90%, of the untreated cells. When a 100 μM concentration of the test compound is used, cells treated with preferred test compounds exhibit ATP levels that are at least 50%, preferably at least 80%, of the ATP levels detected in untreated cells.

Example 9 Dorsal Root Ganglion Cell Assay

This Example illustrates a representative dorsal root ganglian cell assay for evaluating VR1 antagonist activity of a compound.

DRG are dissected from neonatal rats, dissociated and cultured using standard methods (Aguayo and White (1992) Brain Research 570:61-67). After 48 hour incubation, cells are washed once and incubated for 30-60 minutes with the calcium sensitive dye Fluo 4 AM (2.5-10 ug/ml; TefLabs, Austin, Tex.). Cells are then washed once, and various concentrations of compound is added to the cells. Addition of capsaicin to the cells results in a VR1-dependent increase in intracellular calcium levels which is monitored by a change in Fluo-4 fluorescence with a fluorometer. Data are collected for 60-180 seconds to determine the maximum fluorescent signal. Fluorescent signal is then plotted as a function of compound concentration to identify the concentration required to achieve a 50% inhibition of the capsaicin-activated response, or IC₅₀. Antagonists of the capsaicin receptor preferably have an IC₅₀ below 1 micromolar, 100 nanomolar, 10 nanomolar or 1 nanomolar.

Example 10 Animal Models for Determining Pain Relief

This Example illustrates representative methods for assessing the degree of pain relief provided by a compound.

A. Pain Relief Testing

The following methods may be used to assess pain relief.

Mechanical Allodynia

Mechanical allodynia (an abnormal response to an innocuous stimulus) is assessed essentially as described by Chaplan et al. (1994) J. Neurosci. Methods 53:55-63 and Tal and Eliav (1998) Pain 64(3):511-518. A series of von Frey filaments of varying rigidity (typically 8-14 filaments in a series) are applied to the plantar surface of the hind paw with just enough force to bend the filament. The filaments are held in this position for no more than three seconds or until a positive allodynic response is displayed by the rat. A positive allodynic response consists of lifting the affected paw followed immediately by licking or shaking of the paw. The order and frequency with which the individual filaments are applied are determined by using Dixon up-down method. Testing is initiated with the middle hair of the series with subsequent filaments being applied in consecutive fashion, ascending or descending, depending on whether a negative or positive response, respectively, is obtained with the initial filament.

Compounds are effective in reversing or preventing mechanical allodynia-like symptoms if rats treated with such compounds require stimulation with a Von Frey filament of higher rigidity strength to provoke a positive allodynic response as compared to control untreated or vehicle treated rats. Alternatively, or in addition, testing of an animal in chronic pain may be done before and after compound administration. In such an assay, an effective compound results in an increase in the rigidity of the filament needed to induce a response after treatment, as compared to the filament that induces a response before treatment or in an animal that is also in chronic pain but is left untreated or is treated with vehicle. Test compounds are administered before or after onset of pain. When a test compound is administered after pain onset, testing is performed 10 minutes to three hours after administration.

Mechanical Hyperalgesia

Mechanical hyperalgesia (an exaggerated response to painful stimulus) is tested essentially as described by Koch et al. (1996) Analgesia 2(3):157-164. Rats are placed in individual compartments of a cage with a warmed, perforated metal floor. Hind paw withdrawal duration (i.e., the amount of time for which the animal holds its paw up before placing it back on the floor) is measured after a mild pinprick to the plantar surface of either hind paw.

Compounds produce a reduction in mechanical hyperalgesia if there is a statistically significant decrease in the duration of hindpaw withdrawal. Test compound may be administered before or after onset of pain. For compounds administered after pain onset, testing is performed 10 minutes to three hours after administration.

Thermal Hyperalgesia

Thermal hyperalgesia (an exaggerated response to noxious thermal stimulus) is measured essentially as described by Hargreaves et al. (1988) Pain. 32(1):77-88. Briefly, a constant radiant heat source is applied the animals' plantar surface of either hind paw. The time to withdrawal (i.e., the amount of time that heat is applied before the animal moves its paw), otherwise described as thermal threshold or latency, determines the animal's hind paw sensitivity to heat.

Compounds produce a reduction in thermal hyperalgesia if there is a statistically significant increase in the time to hindpaw withdrawal (i.e., the thermal threshold to response or latency is increased). Test compound may be administered before or after onset of pain. For compounds administered after pain onset, testing is performed 10 minutes to three hours after administration.

B. Pain Models

Pain may be induced using any of the following methods, to allow testing of analgesic efficacy of a compound. In general, compounds provided herein result in a statistically significant reduction in pain as determined by at least one of the previously described testing methods, using male SD rats and at least one of the following models.

Acute Inflammatory Pain Model

Acute inflammatory pain is induced using the carrageenan model essentially as described by Field et al. (1997) Br. J. Pharmacol. 121(8):1513-1522. 100-200 μl of 1-2% carrageenan solution is injected into the rats' hind paw. Three to four hours following injection, the animals' sensitivity to thermal and mechanical stimuli is tested using the methods described above. A test compound (0.01 to 50 mg/kg) is administered to the animal, prior to testing, or prior to injection of carrageenan. The compound can be administered orally or through any parenteral route, or topically on the paw. Compounds that relieve pain in this model result in a statistically significant reduction in mechanical allodynia and/or thermal hyperalgesia.

Chronic Inflammatory Pain Model

Chronic inflammatory pain is induced using one of the following protocols:

-   -   1. Essentially as described by Bertorelli et al. (1999) Br. J.         Pharmacol. 128(6):1252-1258, and Stein et al. (1998) Pharmacol.         Biochem. Behav. 31(2):455-51, 200 μl Complete Freund's Adjuvant         (0.1 mg heat killed and dried M. Tuberculosis) is injected to         the rats' hind paw: 100 μl into the dorsal surface and 100 μl         into the plantar surface.     -   2. Essentially as described by Abbadie et al. (1994) J Neurosci.         14(10):5865-5871 rats are injected with 150 μl of CFA (1.5 mg)         in the tibio-tarsal joint.

Prior to injection with CFA in either protocol, an individual baseline sensitivity to mechanical and thermal stimulation of the animals' hind paws is obtained for each experimental animal.

Following injection of CFA, rats are tested for thermal hyperalgesia, mechanical allodynia and mechanical hyperalgesia as described above. To verify the development of symptoms, rats are tested on days 5, 6, and 7 following CFA injection. On day 7, animals are treated with a test compound, morphine or vehicle. An oral dose of morphine of 1-5 mg/kg is suitable as positive control. Typically, a dose of 0.01-50 mg/kg of test compound is used. Compounds can be administered as a single bolus prior to testing or once or twice or three times daily, for several days prior to testing. Drugs are administered orally or through any parenteral route, or applied topically to the animal.

Results are expressed as Percent Maximum Potential Efficacy (MPE). 0% MPE is defined as analgesic effect of vehicle, 100% MPE is defined as an animal's return to pre-CFA baseline sensitivity. Compounds that relieve pain in this model result in a MPE of at least 30%.

Chronic Neuropathic Pain Model

Chronic neuropathic pain is induced using the chronic constriction injury (CCI) to the rat's sciatic nerve essentially as described by Bennett and Xie (1988) Pain 33:87-107. Rats are anesthetized (e.g. with an intraperitoneal dose of 50-65 mg/kg pentobarbital with additional doses administered as needed). The lateral aspect of each hind limb is shaved and disinfected. Using aseptic technique, an incision is made on the lateral aspect of the hind limb at the mid thigh level. The biceps femoris is bluntly dissected and the sciatic nerve is exposed. On one hind limb of each animal, four loosely tied ligatures are made around the sciatic nerve approximately 1-2 mm apart. On the other side the sciatic nerve is not ligated and is not manipulated. The muscle is closed with continuous pattern and the skin is closed with wound clips or sutures. Rats are assessed for mechanical allodynia, mechanical hyperalgesia and thermal hyperalgesia as described above.

Compounds that relieve pain in this model result in a statistically significant reduction in mechanical allodynia, mechanical hyperalgesia and/or thermal hyperalgesia when administered (0.01-50 mg/kg, orally, parenterally or topically) immediately prior to testing as a single bolus, or for several days: once or twice or three times daily prior to testing.

From the foregoing it will be appreciated that, although specific embodiments of the invention have been described herein for purposes of illustration, various modifications may be made without deviating from the spirit and scope of the invention. Accordingly, the invention is not limited except as by the appended claims. 

1. A compound of the formula:

or a pharmaceutically acceptable salt thereof, wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₃-C₈alkanone, C₂-C₈alkenyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₂ is a 5- to 7-membered aromatic heterocycle, optionally substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); Ar₁ is a 5- to 10-membered aromatic carbocycle or heterocycle, optionally substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)-1-S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); and R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl).
 2. A compound according to claim 1, wherein V is N.
 3. A compound according to claim 1, wherein X is N. 4.-5. (canceled)
 6. A compound according to claim 1, wherein W, Y and Z are each independently N or CH.
 7. A compound according to 6, wherein W and Y are each CH and Z is N, or wherein W and Z are each CH and Y is N.
 8. A compound according to claim 1, wherein Ar₂ is selected from pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, pyrrolyl, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl and thiadiazolyl, each of which is unsubstituted or substituted with 1 or 2 substituents selected from halogen, cyano, C₁-C₆alkyl, haloC₁-C₆alkyl, hydroxyC₁-C₆alkyl, C₂-C₈alkyl ether, C₁-C₆alkanoyl, amino, mono- and di-(C₁-C₆alkyl)amino.
 9. A compound according to claim 1, wherein Ar₂ is pyridyl, isoxazolyl, thiadiazolyl or pyrazolyl, each of which is unsubstituted or substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl.
 10. A compound according to claim 1, wherein Ar₁ is phenyl or pyridyl, optionally substituted with halogen, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy or haloC₁-C₆alkoxy.
 11. A compound according to claim 1, wherein U is CR₂, and R₂ is: (i) hydrogen or halogen; or (ii) C₁-C₆alkyl, —(CH₂)_(n)NH₂, —(CH₂)_(n)NH(C₁-C₈alkyl), —(CH₂)_(n)N(C₁-C₈alkyl)₂, —(CH₂)_(n)(5- to 8-membered heterocycloalkyl), or —(CH₂)_(n)OH, each of which is unsubstituted or substituted with from 1 to 4 substituents independently chosen from halogen, cyano, hydroxy, amino, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, and haloC₁-C₆alkyl. 12.-13. (canceled)
 14. A compound according to claim 13, wherein Ar₁ and Ar₂ are each pyridyl, substituted with 1 substituent independently chosen from halogen, C₁-C₄alkyl, C₁-C₄haloalkyl, and C₁-C₄alkoxy.
 15. (canceled)
 16. A compound of the formula:

or a pharmaceutically acceptable salt thereof, wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₃-C₈alkanone, C₂-C₈alkenyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₁ and Ar₂ are independently chosen from phenyl and 5- and 6-membered aromatic heterocycles, optionally substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)-1-S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and R₇ is C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, mono- or di(C₁-C₈alkyl)amino or a 3- to 10-membered heterocycle, each of which is optionally substituted with from 1 to 5 substituents independently selected from hydroxy, halogen, C₁-C₆alkyl, C₁-C₈alkoxy, C₂-C₈alkyl ether, haloC₁-C₈alkyl and haloC₁-C₈alkoxy.
 17. A compound according to claim 16, wherein V is N.
 18. A compound according to claim 16, wherein X is N. 19.-20. (canceled)
 21. A compound according to claim 16, wherein W, Y and Z are each independently N or CH.
 22. A compound according to 21, wherein W and Y are each CH and Z is N, or wherein W and Z are each CH and Y is N.
 23. A compound according to claim 16, wherein Ar₂ is phenyl or pyridyl, each of which is optionally substituted with 1 or 2 substituents selected from halogen, cyano, C₁-C₆alkyl and haloC₁-C₆alkyl.
 24. A compound according to claim 16, wherein Ar₂ is phenyl, optionally substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl.
 25. A compound according to claim 16, wherein Ar₁ is phenyl or pyridyl, optionally substituted with halogen, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy or haloC₁-C₆alkoxy.
 26. A compound according to claim 16, wherein U is CR₂ and R₂ is (i) hydrogen or halogen; or (ii) C₁-C₆alkyl, —(CH₂)_(n)NH₂, —(CH₂)_(n)NH(C₁-C₈alkyl), —(CH₂)_(n)N(C₁-C₈alkyl)₂, —(CH₂)_(n)(5- to 8-membered heterocycloalkyl) or —(CH₂)_(n)OH, each of which is unsubstituted or substituted with from 1 to 4 substituents independently chosen from halogen, cyano, hydroxy, amino, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl and haloC₁-C₆alkyl. 27.-28. (canceled)
 29. A compound according to claim 16, wherein R₇ comprises a nitrogen atom directly bonded to the SO₂.
 30. A compound according to claim 29, wherein R₇ is amino, mono- or di(C₁-C₆alkyl)amino, morpholinyl, piperidinyl, piperazinyl or pyrrolidinyl, each of which is unsubstituted or substituted with from 1 to 3 substituents independently chosen from halogen, C₁-C₆alkyl and haloC₁-C₆alkyl.
 31. A compound according to claim 16, wherein R₇ is C₁-C₆alkyl, haloC₁-C₆alkyl, morpholinyl, piperidinyl, piperazinyl or pyrrolidinyl, optionally substituted with from 1 to 5 substituents independently selected from C₁-C₆alkyl, C₁-C₆alkoxy, C₁-C₆alkyl ether, haloC₁-C₆alkyl and haloC₁-C₆alkoxy. 32.-33. (canceled)
 34. A compound of the formula:

Wherein: V, X, W, Y and Z are selected from the following combinations: V X W Y Z N CH CH CH CH CH N CH CH CH CH N CH CH CH N CH CH N CH CH N CH N CH CH N CH N CH N CH CH CH N CH N CH CH N CH N CH CH N N CH N CH CH CH N N CH CH CH N N CH CH N CH N CH N CH N N CH N N N N CH N CH N N CH N N CH CH N N CH N CH N N N N CH N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₆alkyl)amino; Ar₁ and Ar₂ are independently selected from phenyl and 5- to 7-membered aromatic heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); R₃ and R₄ are: (i) each independently selected from: (a) hydrogen; (b) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₁-C₈alkoxy, C₃-C₈alkanone, C₂-C₈alkanoyl, C₂-C₈alkyl ether, C₆-C₁₀arylC₀-C₈alkyl, 5- to 10-membered heterocycleC₀-C₈alkyl and —(SO₂)C₁-C₈alkyl, each of which is optionally substituted with from 1 to 9 substituents independently selected from R_(b); and (c) groups that are joined to an R₅ or R₆ to form a 4- to 10-membered heterocyclic group that is unsubstituted or substituted with from 1 to 6 substituents independently selected from R_(b); or (ii) joined to form, with the N to which they are bound, a 4- to 10-membered heterocyclic group that is unsubstituted or substituted with from 1 to 6 substituents independently selected from R_(b), C₁-C₈alkanoyl, 4- to 7-membered heterocycloalkylC₀-C₄alkyl, and mono- and di-(C₁-C₆alkyl)aminoC₁-C₆alkyl; R₅ and R₆ are, independently at each occurrence: (i) each independently selected from: (a) hydrogen or hydroxy; (b) C₁-C₈alkyl, unsubstituted or substituted with 1 or 2 substituents independently selected from R_(b); and (c) groups that are joined to R₃ or R₄ to form a 4- to 10-membered heterocyclic group that is unsubstituted or substituted with from 1 to 6 substituents independently selected from R_(b); (ii) taken together to form a keto group; or (iii) joined to form a 3- to 7-membered carbocyclic or heterocyclic ring, unsubstituted or substituted with from 1 to 4 substituents selected from R_(b); R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and n is 1, 2 or
 3. 35.-36. (canceled)
 37. A compound or salt according to claim 34, wherein Y is N and W and Z are CH.
 38. A compound or salt according to claim 34, wherein Z is N and W and Y are CH.
 39. A compound or salt according to claim 34, wherein W, Y and Z are each CH.
 40. A compound or salt according to claim 34, wherein Ar₁ and Ar₂ are independently selected from phenyl and 6-membered aromatic heterocycles, each of which is substituted with 0, 1 or 2 substituents.
 41. A compound or salt according to claim 40, wherein: (i) Ar₁ is phenyl or pyridyl, each of which is unsubstituted or substituted with 1 or 2 substituents selected from halogen, hydroxy, cyano, amino, nitro, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy; and (ii) Ar₂ is phenyl or pyridyl, each of which is unsubstituted or substituted with 1 or 2 substituents independently selected from halogen, hydroxy, cyano, amino, mono- and di-(C₁-C₆alkyl)amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy, haloC₁-C₆alkoxy, C₂-C₆alkyl ether, C₁-C₆alkanoyl, —(SO₂)R₂, —NR_(x)S(O)_(m)—, and —N(S(O_(m))₂; wherein m is 1 or 2, R_(x) is hydrogen or C₁-C₆alkyl, and R₂ is C₁-C₆alkyl, haloC₁-C₆alkyl, amino, mono- or di-(C₁-C₆alkyl)amino or a 5- to 10-membered, N-linked heterocyclic group, each of which R₂ is optionally substituted with R_(b).
 42. A compound or salt according to claim 41, wherein: (i) Ar₁ is pyridyl, unsubstituted or substituted with halogen, C₁-C₄alkyl or haloC₁-C₄alkyl; and (ii) Ar₂ is phenyl or pyridyl, each of which is unsubstituted or substituted with halogen, cyano, C₁-C₄alkyl, haloC₁-C₄alkyl, C₂-C₄alkyl ether, C₁-C₄alkanoyl or —(SO₂)R_(a), wherein R_(a) is C₁-C₄alkyl or haloC₁-C₄alkyl.
 43. A compound or salt according to claim 42, wherein: (i) Ar₁ is pyridin-2-yl, 3-methyl-pyridin-2-yl, 3-trifluoromethyl-pyridin-2-yl or 3-halo-pyridin-2-yl; and (ii) Ar₂ is phenyl, 2-pyridyl or 3-pyridyl, each of which is substituted at the 4-position with trifluoromethanesulfonyl, propanesulfonyl, propane-2-sulfonyl, t-butyl, trifluoromethyl or 2,2,2-trifluoro-1-methyl-ethyl.
 44. A compound or salt according to claim 34, wherein R₃ and R₄ are each independently: (i) hydrogen; or (ii) C₁-C₈alkyl, C₂-C₈alkenyl, phenylC₀-C₄alkyl, indanylC₀-C₄alkyl, 5- to 6-membered heteroarylC₀-C₄alkyl, or 4- to 7-membered heterocycloalkylC₀-C₄alkyl, each of which is unsubstituted or substituted with from 1 to 4 substituents independently selected from hydroxy, halogen, amino, C₁-C₆alkyl, haloC₁-C₆alkyl, C₁-C₆alkoxy and haloC₁-C₆alkoxy.
 45. A compound or salt according to claim 44, wherein R₃ and R₄ are each independently: (i) hydrogen; or (ii) C₁-C₆alkyl, C₂-C₆alkenyl, 5- to 7-membered heterocycloC₀-C₄alkyl, C₂-C₆alkyl ether, indanyl, benzyl, 1-phenyl-ethyl, 1-phenyl-propyl and 2-phenyl-ethyl, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from hydroxy, halogen and C₁-C₄alkyl.
 46. A compound or salt according to claim 44, wherein one of R₃ and R₄ is pyridylC₀-C₄alkyl, pyrimidylC₀-C₄alkyl, imidazolylC₀-C₄alkyl or tetrazolylc₀-C₄alkyl, each of which is substituted with 0, 1 or 2 substituents.
 47. A compound or salt according to claim 34, wherein R₃ and R₄ are joined to form a 5 to 10-membered heterocyclic group that is substituted with from 0 to 4 substituents.
 48. A compound or salt according to claim 47, wherein the heterocyclic group is substituted with at least one substituent selected from hydroxy, halogen, C₁-C₄alkyl, haloC₁-C₄alkyl, C₁-C₄alkoxy, haloC₁-C₄alkoxy, C₁-C₄alkanoyl, and aminocarbonyl.
 49. A compound or salt according to claim 47, wherein the heterocyclic group comprises an aromatic ring.
 50. (canceled)
 51. A compound or salt according to claim 47, wherein the heterocyclic group is a 5- to 10-membered heterocycloalkyl, substituted with from 0 to 4 substituents. 52.-54. (canceled)
 55. A compound or salt according to claim 34, wherein each R₅ and R₆ is independently selected from hydrogen and C₁-C₆alkyl.
 56. (canceled)
 57. A compound or salt according to claim 34, wherein n is
 1. 58.-60. (canceled)
 61. A compound or salt according to claim 1 wherein the compound has an IC₅₀ value of 100 nanomolar or less in a capsaicin receptor calcium mobilization assay.
 62. A compound or salt according to claim 16 wherein the compound has an IC₅₀ value of 100 nanomolar or less in a capsaicin receptor calcium mobilization assay.
 63. A compound or salt according to claim 34, wherein the compound has an IC₅₀ value of 100 nanomolar or less in a capsaicin receptor calcium mobilization assay. 64.-69. (canceled)
 70. A pharmaceutical composition, comprising at least one compound or salt according to claim 1 in combination with a physiologically acceptable carrier or excipient.
 71. A pharmaceutical composition, comprising at least one compound or salt according to claim 16 in combination with a physiologically acceptable carrier or excipient.
 72. A pharmaceutical composition, comprising at least one compound or salt according to claim 34 in combination with a physiologically acceptable carrier or excipient.
 73. A pharmaceutical composition according to claim 70 wherein the composition is formulated as an injectible fluid, an aerosol, a cream, a gel, a pill, a capsule, a syrup or a transdermal patch.
 74. A pharmaceutical composition according to claim 71 wherein the composition is formulated as an injectible fluid, an aerosol, a cream, a gel, a pill, a capsule, a syrup or a transdermal patch.
 75. A pharmaceutical composition according to claim 72 wherein the composition is formulated as an injectible fluid, an aerosol, a cream, a gel, a pill, a capsule, a syrup or a transdermal patch.
 76. A method for reducing calcium conductance of a cellular capsaicin receptor, comprising contacting a cell expressing a capsaicin receptor with at least one compound or salt of the formula:

wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, N(R_(z)), S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₆-C₁₀arylC₀-C₈alkyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₁ and Ar₂ are independently selected from 5- to 10-membered aromatic carbocycles and heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)-1-S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); and R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and thereby reducing calcium conductance of the capsaicin receptor.
 77. A method according to claim 76, wherein the compound is a compound according to claim
 1. 78. A method according to claim 76, wherein the compound is a compound according to claim
 16. 79. A method according to claim 76, wherein the compound is a compound according to claim
 34. 80. A method according to claim 76, wherein the cell is a neuronal cell that is contacted in vivo in an animal.
 81. A method according to claim 80, wherein during contact the compound is present within a body fluid of the animal.
 82. A method according to claim 81, wherein the compound is present in the blood of the animal at a concentration of 100 nanomolar or less.
 83. A method according to claim 80, wherein the animal is a human.
 84. A method according to claim 80, wherein the compound is administered orally. 85.-93. (canceled)
 94. A method according to claim 89, wherein the compound is present in the blood of the patient at a concentration of 100 nanomolar or less.
 95. A method for treating a condition responsive to capsaicin receptor modulation in a patient, comprising administering to the patient a capsaicin receptor modulatory amount of at least one compound or salt of the formula:

wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, N(R_(z)), S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₆-C₁₀arylC₀-C₈alkyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₁ and Ar₂ are independently selected from 5- to 10-membered aromatic carbocycles and heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)-1-S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); and R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and thereby alleviating the condition in the patient.
 96. A method according to claim 95, wherein the compound is a compound according to claim
 1. 97. A method according to claim 95, wherein the compound is a compound according to claim
 16. 98. A method according to claim 95, wherein the compound is a compound according to claim
 34. 99. A method according to claim 95, wherein the patient is suffering from (i) exposure to capsaicin, (ii) burn or irritation due to exposure to heat, (iii) burns or irritation due to exposure to light, (iv) burn, bronchoconstriction or irritation due to exposure to tear gas, air pollutants or pepper spray, or (v) burn or irritation due to exposure to acid.
 100. A method according to claim 95, wherein the compound is present in the blood of the animal at a concentration of 100 nanomolar or less.
 101. A method according to claim 95, wherein the condition is treating asthma or chronic obstructive pulmonary disease.
 102. A method for treating pain in a patient, comprising administering to a patient suffering from pain a capsaicin receptor modulatory amount of at least one compound or salt of the formula:

wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, N(R_(z)), S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₆-C₁₀arylC₀-C₈alkyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₁ and Ar₂ are independently selected from 5- to 10-membered aromatic carbocycles and heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)—, —S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); and R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and thereby alleviating pain in the patient.
 103. A method according to claim 102, wherein the compound is a compound according claim
 1. 104. A method according to claim 102, wherein the compound is a compound according to claim
 16. 105. A method according to claim 102, wherein the compound is a compound according to claim
 34. 106. A method according to claim 102, wherein the compound is present in the blood of the animal at a concentration of 100 nanomolar or less.
 107. A method according to claim 102, wherein the patient is suffering from neuropathic pain.
 108. A method according to claim 102, wherein the pain is associated with a condition selected from: postmastectomy pain syndrome, stump pain, phantom limb pain, oral neuropathic pain, toothache, postherpetic neuralgia, diabetic neuropathy, reflex sympathetic dystrophy, trigeminal neuralgia, osteoarthritis, rheumatoid arthritis, fibromyalgia, Guillain-Barre syndrome, meralgia paresthetica, burning-mouth syndrome, bilateral peripheral neuropathy, causalgia, neuritis, neuronitis, neuralgia, AIDS-related neuropathy, MS-related neuropathy, spinal cord injury-related pain, surgery-related pain, musculoskeletal pain, back pain, headache, migraine, angina, labor, hemorrhoids, dyspepsia, Charcot's pains, intestinal gas, menstruation, cancer, venom exposure, irritable bowel syndrome, inflammatory bowel disease, and/or trauma.
 109. A method according to claim 102, wherein the patient is a human.
 110. A method for treating itch in a patient, comprising administering to a patient a capsaicin receptor modulatory amount of a compound or salt of the formula:

wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, N(R_(z)), S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₆-C₁₀arylC₀-C₈alkyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₁ and Ar₂ are independently selected from 5- to 10-membered aromatic carbocycles and heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)-1-S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); and R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and thereby alleviating itch in the patient.
 111. A method according to claim 110, wherein the compound is a compound according to claim
 1. 112. A method according to claim 110, wherein the compound is a compound according to claim
 16. 113. A method according to claim 110, wherein the compound is a compound according to claim
 34. 114. A method for treating cough or hiccup in a patient, comprising administering to a patient a capsaicin receptor modulatory amount of a compound or salt of the formula:

wherein: U, V, X, W, Y and Z are selected from the following combinations: U V X W Y Z CR₂ N CH CH CH CH CR₂ CH N CH CH CH N CH N CH CH CH CR₂ N CH CH N CH CR₂ CH N CH N CH N CH N CH N CH CR₂ N CH CH CH N CR₂ CH N CH CH N N CH N CH CH N CR₂ N CH N CH CH CR₂ CH N N CH CH N CH N N CH CH CR₂ N CH N CH N CR₂ CH N N CH N CR₂ N N N CH N N CH N N CH N CR₂ N CH CH N N CR₂ CH N CH N N CR₂ N N CH N N N CH N CH N N;

R₁ is independently selected at each occurrence from hydrogen, halogen, hydroxy, cyano, amino, C₁-C₈alkyl, haloC₁-C₈alkyl, C₁-C₈alkoxy, haloC₁-C₈alkoxy and mono- and di-(C₁-C₈alkyl)amino; R₂ is: (i) hydrogen, halogen or cyano; (ii) C₂-C₈alkanoyl or C₃-C₈alkanone, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (iii) a group of the formula —R_(c)-M-A-R_(y), wherein: R_(c) is C₀-C₃alkyl; M is a bond, N(R_(z)), S, SO₂, (C═O)_(p)N(R_(z)), N(R_(z))(C═O)_(p), SO₂N(R_(z)), or N(R_(z))SO₂, wherein p is 0 or 1; A is a bond or C₁-C₈alkyl, optionally substituted with from 1 to 3 substituents independently selected from R_(d); and R_(y) and R_(z), if present, are: (a) independently hydrogen, C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₆-C₁₀arylC₀-C₈alkyl, a 4- to 10-membered carbocycle, or joined to R_(c) to form a 4- to 10-membered carbocycle, wherein each R_(y) and R_(z) is independently unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d); or (b) joined to form a 4- to 10-membered heterocycle that is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(d);  wherein R_(d) is independently selected at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkylthio, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); Ar₁ and Ar₂ are independently selected from 5- to 10-membered aromatic carbocycles and heterocycles, each of which is unsubstituted or substituted with from 1 to 3 substituents independently selected from groups of the formula LR_(a); L is independently selected at each occurrence from a bond, —O—, —C(═O)—, —OC(═O)—, —C(═O)O—, —O—C(═O)O—, —S(O)_(m)—, —NR_(x)—, —C(═O)NHR_(x)—, —NHR_(x)C(═O)—, —NR_(x)S(O)_(m)-1-S(O)_(m)NR_(x)— and —N[S(O)_(m)R_(x)]S(O)_(m)—; wherein m is independently selected at each occurrence from 0, 1 and 2; and R_(x) is independently selected at each occurrence from hydrogen and C₁-C₈alkyl; R_(a) is independently selected at each occurrence from: (i) hydrogen, halogen, cyano and nitro; and (ii) C₁-C₈alkyl, C₂-C₈alkenyl, C₂-C₈alkynyl, C₂-C₈alkyl ether, 3- to 10-membered heterocycles, mono- and di-(C₁-C₈alkyl)amino and (3- to 10-membered heterocycle)C₁-C₆alkyl, each of which is unsubstituted or substituted with from 1 to 9 substituents independently selected from R_(b); and R_(b) is independently chosen at each occurrence from hydroxy, halogen, amino, aminocarbonyl, amido, cyano, nitro, C₁-C₈alkyl, C₁-C₈alkoxy, C₁-C₈alkylthio, C₂-C₈alkyl ether, hydroxyC₁-C₈alkyl, haloC₁-C₈alkyl, phenyl, phenyl(C₁-C₈alkyl), mono- and di-(C₁-C₆alkyl)amino, (SO₂)C₁-C₈alkyl, 5- to 7-membered heterocycle and (5- to 7-membered heterocycle) (C₁-C₈alkyl); and thereby alleviating cough or hiccup in the patient.
 115. A method according to claim 114, wherein the compound is a compound according to claim
 1. 116. A method according to claim 114, wherein the compound is a compound according to claim
 16. 117. A method according to claim 114, wherein the compound is a compound according to claim
 34. 118.-133. (canceled)
 134. A compound or salt according to claim 51, wherein the heterocyclic group is substituted with from 1 to 4 substituents independently selected from methyl and ethyl.
 135. A compound or salt according to claim 1, wherein the compound is selected from the group consisting of: (4-trifluoromethyl-phenyl)-[6-(2-trifluoromethyl-phenyl)-phthalazin-1-yl]amine; (4-tert-Butyl-phenyl)-(6-pyridin-2-yl-phthalazin-1-yl)-amine; (4-tert-Butyl-phenyl)-[7-(3-trifluoromethyl-pyridin-2-yl)-quinolin-4-yl]-amine; (4-tert-butyl-phenyl)-[6-(2-trifluoromethyl-phenyl)-isoquinolin-1-yl]-amine; (4-trifluoromethyl-phenyl)-[6-(2-trifluoromethyl-phenyl)-isoquinolin-1-yl]amine; and (4-tert-butyl-phenyl)-[7-(2-trifluoromethyl-phenyl)-pyrido[3,2-d]pyrimidin-4-yl]-amine. 